**Tochnog Professional Changes**.

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Corrected bug in

**group_materi_stress_null**

Corrected bug in

**group_materi_plasti_tension_direct**in MS Windows (unitialised array may lead to calculation abort)

Introduced

**-any_but_not_all**in

**area_element_group_method**

Introduced

**materi_displacement_relative**i.c.w.

**materi_velocity_integrated**

Corrected bug in

**control_mesh_macro ... -cylinder**(wrong elements generated)

Introduced

**control_mesh_switch**(switch x, y, z coordinates for easy rotating the mesh).

Introduced

**control_mesh_macro ... -rectangle**for 3d calculations.

On Microsoft Windows the linux executable in a 'windows subsystem for linux' runs faster than the native windows executable.

Introduced

**strain_settlement_diagram***(make values in strain settlement dependend on stresses, total pressures, etc.).

Introduced

**force_edge_multi_linear_factor_x**(distributed edge force dependend on multilinear x-diagram).

Corrected bug in

**slide_***for nodes which also have a

**bounda_dof**.

Extra listings in the external software page.

Corrected bug in tar files (tar bug on specific linux systems).

Some bug fixes.

Introduced

**control_reset_value_dof**(by example, make void ratio of hypo laws dependent on vertical stress).

Donate to support Ukraine and its people

Introduced more software in the external software page.

Introduced the Simscale finite element program in the external software list.

Introduced the Welsim finite element program in the external software list.

Introduced the Freecad CAD program in the external software list.

Introduced the PrePoMax free pre- and -post processor in the external software list.

Update for latest intel processors.

Introduced OCR for

**group_materi_plasti_hypo_masin**.

Introduced

**group_groundflow_permeability_vertical_stress**(permeability dependend on vertical stress).

Introduced Free Adonis geotechnical FE program in the external_software list.

Speed up calculations with many empty elements.

Corrected bug in

**dependency_diagram**(when using one of the coordinates x,y or z for the dependency).

Introduced

**groundflow_pressure_factor**(user specified multiplication factor to add pore pressure to the effective stress when calculating the total stress).

Introduced

**post_point_move**(let a post point follow a material particle, by using the calculated velocity field).

Changed

**group_materi_stress_null**(allow for zero stress in multiple directions).

Introduced

**group_materi_plasti_tension_direct_normal_automatic**(tension limit on plane with outward normal).

Introduced

**group_materi_plasti_tension_direct_normal**(tension limit on plane specified by normal).

Introduced

**group_materi_plasti_mohr_coul_direct_normal_automatic**(friction limit on plane with outward normal).

Introduced

**group_materi_plasti_mohr_coul_direct_normal**(friction limit on plane specified by normal).

Re-introduced

**group_interface_materi_plasti_tension_direct**(now as real value, the maximum interface tensile stress).

Changed

**group_interface_gap**(default gap size 0, so stresses 0 if interface normal strain is positive).

Changed

**group_materi_plasti_tension_direct**to default 0 tension stress allowed i.c.w.

**group_materi_plasti_mohr_coul_direct**.

Introduced

**materi_plasti_maximum_iterations***(set maximum number of plastic iterations on integration point level).

Changed from openmp to posix parallelisation on linux (recent linux gcc openmp seems to have a bug).

Changed

**control_mesh_move***(allow for linear moving nodes in mesh to get oblique meshes).

Introduced

**bounda_time_until_***(automatic limit force response by reducing prescribed velocities).

Introduced

**control_print_history_factor**(multiplication factor for items in

**control_print_history**).

Introduced

**control_print_data_versus_data_factor**(multiplication factor for items in

**control_print_data_versus_data**).

Introduced error message on comments in include files.

Introduced

**control_mesh_generate_interface_geometry**for 3d (restrict generation of interfaces to specified geometry).

Introduced interface data for

**print_group_data**(view interface group data in gid).

Introduced

**control_mesh_generate_interface_geometry**for 2d (restrict generation of interfaces to specified geometry).

Corrected bug in

**print_group_data**(sometimes wrong values printed for group data items).

Corrected bug in

**control_reset_dof***i.c.w.

**geometry_method ... -any**(element dofs not put correctly).

Separate history file for

**control_print_history_smooth**.

Introduced

**bounda_time_on_off**(only periodically use specified

**bounda_time**values).

Changed

**group_materi_elasti_young_power**(included minimum for young from power law).

Introduced

**control_print_history_smooth**(smooth printing of history of data values).

Corrected bug in

**change_dataitem_***for method

**-add**(sometimes wrong timestep used).

Introduced

**change_dataitem_apply**(allow, or disallow, change_dataitem records in a timestep).

Introduced

**slide_axisymmetric**(axisymmetric slide geometries allowed).

Introduced

**test/other/force18.dat**(test with

**force_point**).

Introduced

**force_point**(point force in space, can be anywhere, also not in a node).

Introduced group data with variable length for

**print_group_data**(eg

**group_groundflow_permeability**fields can now be viewed in gid).

Introduced

**check_used**(check if input data is actually used in the calculation, convenient in times of trouble).

Introduced

**bounda_dof ... -geometry_list ... -veln**(suppress velocity in normal direction of geometry_list).

Improved

**dependency_number***(also allowed for records with non-fixed length now).

Introduced printing of gid files in case of error exit.

Introduced information in wikipedia format (including papers) on the homepage.

Introduced

**group_integration_method ... -reduced**(weighted combination of lobatto and 1-point cell-centered integration).

Introduced

**bounda_factor_parabolic_x**(quadratic boundary factor in x-direction).

Corrected

**test/other/masonry_facade.dat**(input syntax was old).

Corrected bug in

**control_print_gid_smooth_dof**i.c.w. changing mesh (

**control_mesh_delete***etc.).

Introduced cosmetic changes in

**easy_tochnog_***.

Introduced tochnog professional on chromebooks (enable the linux extension on your chromebook).

Introduced

**control_print_dof_smooth_***(smooth dof's in printed dof text files).

Corrected bug in

**force_..._factor**and changed definition (check your input file).

Improved

**group_materi_plasti_hypo_***i.c.w.

**group_materi_plasti_hypo_cohesion**stability for low stresses (eg near free surfaces).

Introduced

**post_node .. -moment ...**(automatic reaction moment determination in torsion tests etc.).

Introduced Mecway in our external_software list (an extremely inexpensive quality FE program, can be used as pre- and postprocessor for Tochnog Professional).

Introduced Tochnog Professional - Overview in youtube channel (limited overview of capabilities).

Introduced free Tochnog Professional.

Introduced

**group_materi_plasti_hypo_minimum_void_ratio**(minimum allowed void ratio in hypoplasticity calculations).

Introduced

**easy_tochnog**(see easy_tochnog).

Changed

**check_memory_usage**to only RAM usage (not virtual usage anymore).

Introduced

**geometry_mpc**(restrict a geometry to nodes which have an mpc).

Introduced extra input error checking.

Corrected bug in

**control_print_dof_line**for quadratic triangle elements (elements were not always correctly detected).

Introduced

**group_materi_plasti_mohr_coul_direct_wall**(values for phi,c or psi i.c.w.

**group_materi_plasti_bounda**and

**group_materi_plasti_mpc**).

Introduced

**pri(...)**routines in

**user.h**of user supplied distribution (print results in user supplied routines).

Introduced

**test/other/mpc8.dat**(test

**post_element_force**i.c.w. mpc's).

Corrected bug in

**post_element_force_geometry**(for large nodal displacements not the correct elements were found).

Introduced

**post_quadrilateral_element_group**(select specific element group for

**post_quadrilateral**).

Introduced

**test/other/tet10_2.dat**(test tet10 element under gravity load).

Corrected bug in

**control_print_dof_line_element_group**for

**post_calcul**data (selected element group not correctly used).

Introduced

**test/other/mpc7.dat**(example connecting two small elements to one large element).

Introduced

**test/other/shear1.dat**(example shear soil to pile).

Introduced

**control_print_gid_element_mpc**(optionally print not elements with mpc'd nodes).

Improved

**EasyTochnog**(more clear generated input files).

Corrected bug in

**control_print_gid**for printing the element_group of interfaces in certain situations.

Introduced

**test/other/smooth1.dat**(example smoothing results in gid plot).

Changed

**control_print_gid_smooth_***(better smoothing).

Corrected bug in incremental driver for visco hypo laws.

Introduced

**post_point**location plotting for

**control_print_gid**.

Introduced the EasyTochnog input file generator (simple input file generation for typical calculations).

Introduced

**area_element_group_time**(allow

**area_element_group**to be evaluated at all times).

Introduced

**control_mesh_delete_geometry_direct**(directly delete elements when present in a geometry).

Changed

**group_materi_elasti_young_power**(introduced maximum young value).

Introduced

**group_materi_elasti_poisson_power**(power law for poisson ratio).

Introduced

**control_print_gid_smooth**(smooth results in gid plots).

Introduced

**control_reset_dof_value_method**(allow relative of additional change of dof's).

Introduced

**control_print_dof_line_element_group**(select a specific element group for

**control_print_dof_line_***).

Introduced

**scalar_***routines in

**user.h**(mathematical scalar functions for user supplied routines).

Made pdf manuals searchable (previous underscore problem in searches solved).

Introduced

**mpc_element_group_coord_geometry**(mpc nodes of a group only to other group if above lowest coordinate, eg for pile calculations).

Changed

**control_system_call**(now also run at end of each control index, before only at end of each timestep).

Introduced

**data_ignore**(ignore data in input files, can be set as environment symbol, see users manual).

Speed improvements

**mpc_***.

Corrected several

**mesh_gid_***options for combinations different element types.

Introduced

**mpc_apply**(apply, or apply not, mpc's).

Introduced

**mesh_gid_arc**(create arc with gid batch).

Introduced

**control_mesh_move**(move the mesh).

Introduced

**control_mesh_mirror**(mirror the mesh around one of the main axes).

Introduced

**control_mesh_copy**(copy and move the mesh).

Introduced

**-method3**for

**control_mesh_remove**(remove elements if all nodes are mpc'd).

Introduced

**global_node_dof_empty**(optionally set, or set not, dof's in nodes of empty elements to zero).

Introduced constant part in

**group_materi_elasti_young_power_law**.

Introduced

**group_materi_plasti_coord_limit**(prevent plasticity problems near free surfaces).

Introduced

**test/other/node_type_1.dat**(test for

**geometry_node_type**).

Introduced

**geometry_node_type**(select node type for

**geometry_***).

Introduced

**print_node_geometry_present_node_type**(select node type for

**print_node_geometry_present**).

Introduced

**print_element_geometry_present_node_type**(select node type for

**print_element_geometry_present**).

Introduced

**-truss_beam**for

**control_mesh_macro**(generate truss-beams along a line in space).

Introduced

**-all**as special option for

**mpc_element_group**(mpc an element group to all other groups).

Introduced

**-truss**for

**control_mesh_macro**(generate trusses along a line in space).

Introduced

**control_mesh_remove_really_activate_all**(use stress factor in all nodes off re-activated element).

Introduced

**control_mesh_remove_really_activate_factor**now also for pore pressures.

Introduced

**force_edge_water**i.c.w. non-saturated groundwater calculations.

Introduced

**post_calcul_safety_maximum**(maximum value for water safety lifting and piping)

Introduced labels (eg

**-velx**,

**-vely**,

**-pres**) as number in

**print_filter**for all records (eg for

**post_node_result**)

Introduced

**print_gid_calculation_batch**(run gid as batch to generate png result files at end calculation)

Introduced

**control_print_gid_batch**(run gid as batch to generate png result files for specific index)

Introduced

**group_materi_elasti_camclay_pressure_min**(minimum pressure in calculation bulk modulus camclay)

Introduced

**test/other/mesh_gid_8.dat**(demonstrates how to use mesh_gid_* for pile calculations)

Introduced

**mesh_gid_line_structured_concentrate**(concentrate structured element size at start of end of line)

Introduced

**mesh_gid_line_structured_size**(structured element size at specific line)

Introduced new

**mesh_gid_***examples in

**test/other**

Introduced

**mesh_gid_rectangle_***(generate rectangular object with gid batch)

Corrected

**mesh_gid_element**(corrections for non default element types)

Introduced

**mesh_gid_cylinder_hollow**and

**mesh_gid_sphere_hollow**(use these as hollow regions)

Introduced

**control_mesh_gid_assign_conditions_point**,

**control_mesh_gid_assign_conditions_line**and

**control_mesh_gid_assign_conditions_surface**(assign nodes to

**geometry_list**records, use these for boundary conditions, excavations, etc.)

Introduced

**control_mesh_gid**and

**mesh_gid_***(run GiD mesh generation as batch from inside Tochnog)

Introduced string routines in user.h (available for user supplied routines)

For users of GID pre- and postprocessor with Tochnog: the limit of nodes for the free GID is increased up to 10000

Introduced checking if

**bounda_***records are actually used (and give warning if not)

Introduced

**control_mesh_remove_really_activate_factor**(factor to re-activate state variables elements after being removed)

Introduced start and end time for calculations in

**tochnog.log**

Ignore empty elements for

**post_point**,

**post_line**etc. (even if nodes of the empty elements have non-zero dofs from full neighbour elements)

Introduced extra output for

**control_print_vtk**for landslide calculations (selected customers only)

Corrected adonis scripts for writing

**-tria6**elements

Introduced

**group_beam_force_moment_plasti**(ideally plastic limit of forces and moments in beam elements)

Introduced Tochnog Professional - Adonis 1 - Circular hole in youtube channel (Tochnog can read the FE mesh from Adonis).

Introduced

**post_point_element_group**(limit post point search to a specific element group, convenient when point is located in more than 1 element)

Introduced reading mesh from adonis (easy/free geotechnics software; see the

**external_software/adonis**directory in the distribution).

Changed development computer to linux mint 19 tara (old linux computers may not work with our new executables)

Corrected

**post_point**,

**post_line**etc. in combination with

**mesh -follow_material**

Made

**control_print_vtk**compatible with

**glvis**visualisation package

Introduced printing of the coordinates themselves with

**control_print_dof**.

Introduced

**control_print_dof_id**(also print the node number to files with coordinates and dof results)

Introduced

**test/other/distri3.dat**(example normal distributed young in bar, automatic statistical displacement result).

Introduced

**test/other/ground19_water_under_dam.dat**(water flow under dam, limit water flux by extra vertical wall).

Corrected

**control_print_gmsh**(sometimes wrong naming data)

Introduced some extra warnings on possible input errors.

Corrected some syntax for input files in the

**test/***directories.

Introduced

**test/other/hypo13.dat**(biaxial test using Masin 2014 clay visco-hypoplasticity law).

Introduced

**test/other/hypo12.dat**(oedometric test using Masin 2014 clay hypoplasticity law with intergranular strains).

Introduced

**test/other/hypo11.dat**(biaxial test using Wolffersdorff-Niemunis hypoplasticity).

Introduced 2014 masin clay hypoplasticity with input data

**control_materi_plasti_hypo_masin_clay_ocr_apply**,

**group_materi_plasti_hypo_cohesion**,

**group_materi_plasti_hypo_masin_clay**,

**group_materi_plasti_hypo_masin_clay_advanced_parameters**,

**group_materi_plasti_hypo_masin_clay_advanced_direction**,

**group_materi_plasti_hypo_masin_clay_ocr**,

**group_materi_plasti_hypo_masin_clay_structure**and

**group_materi_plasti_hypo_strain_intergranular_masin_clay**(courtesy Dr. David Masin).

Introduced input check on matrix norm intergranular strains (it should not exceed the R parameter).

Changed all postprocessing of the mobilised friction angle to degrees (it was radians before)

Introduced

**group_materi_plasti_hypo_wolffersdorff_niemunis**(extension classical Wolffersdorff hypoplasticity law, courtesy Dr. Andrjzej Niemunis)

Changed

**materi_plasti_hypo_history**in initialisation (do not specify the number of history variables anymore, as preparation implementation several new hypoplastic laws)

Introduced new mathematical routines for user supplied laws in

**user.h**

Changed

**group_materi_plasti_hypo_void_ratio_linear**default to

**-yes**

Introduced pile driving including free surface modelling (selected customers only)

Introduced Tochnog Professional - Racing Team in youtube channel.

Corrected bug in

**mpc_element_group**(bug since 3 months, before it was ok, now solved).

Introduced free incremental driver for full, university and educational licenses (see also

**incremental_driver**in the users manual).

Introduced

**test/other/earthquake_3.dat**(column sand in deep sea subjected to eartquake base acceleration).

Corrected bug preventing calculation of

**...post...**data sometimes.

Corrected bug in

**control_print_vtk**(wrong format coordinates).

Introduced

**test/other/dam_building**(building dam , layer by layer).

Introduced

**test/other/vajont_slope_fs**(real world initial instability calculation of slope).

Speed improvements large calculations (download adviced for those who do large calculations).

Faster

**post_point**,

**post_line**,

**mpc_element_group**etc.

Corrected

**post_point**for

**-hex20**elements.

Introduced Tochnog Professional - Heat Exchanger Pile - 1 - Temperature Variation in youtube channel.

Introduced

**print_vtk_coord**and

**control_print_vtk_coord**(switch on/off printing coordinates in vtk as solution field).

Introduced

**print_vtk_other**and

**print_gid_other**(switch on/off other things in vtk and gid files).

Introduced

**control_print_vtk_group**and

**print_vtk_group**(switch on/off printing element group as result field in vtk files).

Introduced

**control_print_gid_group**and

**print_gid_group**(switch on/off printing element group as result field in gid files).

Introduced

**control_slide_plasti_apply**(use, or use not, slide plasticity data).

Small manual corrections.

Corrected

**group_stiffness_relative**.

Introduced

**control_print_gid_node_method**,

**control_print_gmsh_node_method**and

**control_print_vtk_node_method**(select start nodes or deformed nodes for gid, gmsh and vtk).

Introduced

**control_print_vtk_dof**,

**control_print_vtk_dof_calcul**and

**control_print_vtk_other**(filter printing in vtk files, to get smaller files).

Accuracy improvement multi-material landslide calculations (selected customers only).

Faster landslide calculations (selected customers only).

Removed 32-bit licenses. All licenses are 64 bit now.

Faster large parallel nonlinear calculations.

Memory saved for large parallel calculations.

Introduced

**static_pile_penetration_2d.dat**(quasi-static push pile in soil, for selected customers only).

Introduced

**force_edge_diagram**(make forces dependent on vertical displacements).

More clear explanation

**group_groundflow_capacity**in groundwater theoretical section (in user.pdf manual).

Introduced Tochnog Professional - Masonry - 2 - Facade in youtube channel.

Introduced

**test/other/ground17.dat**(calculation apparent young i.c.w. undrained ground water).

Introduced

**post_calcul_apparent_total**(optionally use total strains and stresses for calculation apparent young and poisson).

Corrected calculation

**-young_apparent**in

**post_calcul**for volumetric softening materials.

Changed naming

**group_materi_plasti_mohr_coul_reduction**into

**group_materi_plasti_mohr_coul_wall**.

Introduced Tochnog Professional - Masonry - 1 - Wall in youtube channel.

Introduced Tochnog Professional - Editor - 2 - Foundation in youtube channel.

Corrected reading *cload in

**input_abaqus**.

Introduced Tochnog Professional - Freecad - 1 - Beam in youtube channel.

Introduced running Tochnog from within Freecad (see

**freecad/README.txt**in the distribution).

Validated

**https://ngsolve.org/**for writing valid tochnog input files (netgen is a free 3D preprocessor).

Introduced

**input_feflow_***(read mesh and hydraulic heads from FEFLOW calculation, use FEFLOW and Tochnog to calculate lifting and piping safety factors).

Corrected printing

**post_force_edge_..._summed**inside multiple timesteps (it was only printed in the last timestep).

Introduced Tochnog Professional - PrePoMax - 2 - Run in youtube channel.

Introduced Tochnog Professional - PrePoMax - 1 - View Results in youtube channel.

Introduced prepomax directory in distribution (files to run tochnog from inside prepomax).

Corrected reading large nsets

**input_abaqus**.

Corrected linking with user supplied

**umat.f**routines (abaqus format).

Introduced

**control_print_frd**(for Free PrePoMax pre- and postprocessor).

Introduced Tochnog Professional - GID - PrePost 4 - Run calculations in youtube channel.

Introduced Tochnog Professional - GID - PrePost 3 - Generate And Export Mesh in youtube channel.

Introduced Tochnog Professional - GID - PrePost 2 - Apply Tochnog in youtube channel.

Introduced Tochnog Professional - GID - PrePost 1 - Make Object in youtube channel.

Introduced Tochnog Professional - Editor - Preprocessing 1 - Temperature Calculation in youtube channel.

Introduced Tochnog Professional - Mecway - Preprocessing 1 - Tapered Beam in youstube channel.

Introduced Tochnog Professional - Paraview - Postprocessing 6 - Select Points in youtube channel.

Introduced Tochnog Professional - Paraview - Postprocessing 5 - Slice and Clip in youtube channel.

Introduced Tochnog Professional - Paraview - Postprocessing 4 - Animations in youtube channel.

Introduced Tochnog Professional - Paraview - Postprocessing 3 - Contour Plots in youtube channel.

Introduced Tochnog Professional - Paraview - Postprocessing 2 - Vectors in youtube channel.

Introduced Tochnog Professional - Paraview - Postprocessing 1 - Show Mesh in youtube channel.

Introduced Tochnog Professional youtube channel Tochnog Professional youtube .

Introduced reaction forces for

**control_print_vtk**(print reaction forces in paraview).

Changed prescribed velocities and rotations to vectors for

**control_print_vtk**(for paraview viewing).

Introduced

**control_reset_node**(select nodes for which

**control_reset_dof**should be applied).

Introduced temperature calculations in

**input_abaqus**(read conductivity, concentrated fluxes, etc.).

Introduced

**tools/gnuplot**in distribution (automatically replot history file with gnuplot for running calculation).

Corrected naming in vtk files from

**control_print_vtk**(for paraview viewing).

Introduced

***parameter**in

**input_abaqus**(convert abaqus parameters to tochnog input).

Simplified

**tochnog/mecway/*.dat**files in the distribution (files used to run Tochnog from inside Mecway).

Validated

**http://mecway.com/**version 8 for writing valid tochnog input files (by using

**input_abaqus**).

Validated

**http://www.freecadweb.org/**for writing valid tochnog input files (by using

**input_abaqus**).

Introduced

**External programs**sub-section at end of users manual (inside the

**Final Topics**section).

Corrected bugs for

**input_abaqus**(some tables not completely read).

Changed

**check_memory_usage**to default

**-yes**(default keep track on maximum used memory).

Introduced

**-element_average**in

**control_print_gid_method**(print in gid files for each element the average of the element results).

Corrected bug in calculations with large number of hex27 elements (memory fault leading the calculation to abort).

Introduced

**post_calcul_safety_method -global**(hydraulic piping and safety lifting based on global stresses).

Introduced

**test/other/ground15.dat**(example calculation hydraulic safety factors using principal stresses).

Introduced

**post_calcul_safety_method -prival**(hydraulic piping and safety lifting based on principal stresses).

Allowed meshes with up to 10000 neighbouring (directly connected) elements.

Corrected bug in the license system for incremental driver. Users for the incremental driver should download the latest version.

Introduced

**heat_exchanger_pile_dt.dat**(heat exchanger pile, temperature only, influence on settlements, etc.; comparison with experiments).

Introduced

**heat_exchanger_pile_load_dt.dat**(heat exchanger pile, temperature and load, influence on settlements, etc.; comparison with experiments).

Corrected bug for

**area_element_group**i.c.w.

**mpc_***(sometimes diverging solutions under specific conditions).

Introduced

**axisymmetric**(globally set axisymmetry, no need for multiple

**group_axisymmetric**anymore).

Introduced

**test/euler_lagrange/dynamic_pile_hammering_2d.dat**(deep pile driving example, for selected customers only).

Introduced

**control_mesh_remove_remove_really**(really do, or do not, remove elements by

**control_mesh_remove**).

Introduced

**print_gid_deformed_mesh**and

**control_print_gid_deformed_mesh**(write deformed mesh to gid files, as opposed to initial mesh).

Corrected bug in generation student license information.

Improved tolerances in

**control_reset_value_multi_linear**(allow nodal coordinates to be exactly on edge of section).

Corrected download problem for new download page, please try downloading again.

Introduced

**tochnog_trial -yes**(explicitely use trial version, suppress further license checking).

Introduced 64 bit trial versions, see the download page.

Introduced extra error checking data items.

Corrected

**control_print_gid**and

**control_print_gmsh**and

**control_print_vtk**(sometimes duplicate result names i.c.w.

**post_calcul**).

Corrected

**area_element_group_sequence_time**(wrong usage of times in table).

Introduced

**zip**(automatically zip database files and postprocessing files).

Introduced

**post_apply**(option to switch off postprocessing to save CPU time).

Changed

**control_post**into

**control_post_apply**(name change).

Changed

**check_data**default to

**-yes**.

Introduced gid manual in manuals section homepage.

Improved

**node_slide**(more accurate determination direction of surface normal).

Introduced

**tools/convert_3d_2d**in distribution (convert 3d node coordinates to 2d coordinates).

Introduced

**solver_pardiso_processors_maximum**.

Introduced

**control_print_history_relative_time**(change time axis in history files).

Introduced

**control_mesh_element_group_apply**(select specific element groups which will be evaluated in the timesteps, default all).

Introduced

**control_timestep_iterations_automatic_redo**(set to

**-no**if timestepping should not be re-done, only proceed with smaller step if needed).

Changed default for

**mesh_boundary**to

**-no**.

Corrected

**area_element_group_sequence**(sometimes crashed tochnog under specific conditions).

Improved

**gmsh**user manual (made more clear convenient post processing commands).

Introduced 'calculations' - 'fast soil impact' example (soil penetrated by rocket, large deformations, free surface model, high mass inertia infuence).

Changed default

**print_element_geometry_present**and

**print_node_geometry_present**to

**-no**(too much computer time and large gid files for large calculations).

Corrected

**geometry_set**(for very long record lengths it lead to memory corruption).

Corrected

**post_point_eps_iso**(it was not always used correctly).

Introduced 'calculations' - 'soil penetration' example (soil penetrated by object, large deformations, free surface model, soil flow refill).

Introduced

**control_mpc_apply**(use, or use not, mpc conditions in certain timesteps).

Introduced

**group_materi_plasti_..._direct_visco**equations in user manual.

Changed

**group_materi_plasti_element_group_factor**(allow one value to specify all factors equal).

Introduced

**print_where**(print what is being done, like evaluate boundary conditions, element loop, etc).

Introduced speed improvement for large heavy parallel computations.

Introduced

**test/other/visc_pl6.dat**(viscoplasticity stress relaxation test i.c.w.

**group_materi_plasti_mohr_coul_direct**).

Removed

**control_timestep_iteration_extra**(not needed anymore).

Introduced

**materi_plasti_tension_apply**and

**control_materi_plasti_tension_apply**(conveniently switch off tension plasticity without removing tension plasticity data).

Introduced

**test/other/visc_pl5.dat**(viscoplasticity stress relaxation test i.c.w.

**group_materi_plasti_tension_direct**).

Introduced

**test/other/visc_pl4.dat**(viscoplasticity deformation test i.c.w.

**group_materi_plasti_tension_direct**).

Introduced

**test/other/visc_pl3.dat**(viscoplasticity deformation test i.c.w.

**group_materi_plasti_mohr_coul_direct**).

Introduced viscoplasticity in

**group_materi_plasti_mohr_coul_direct**and

**group_materi_plasti_tension_direct**and

**group_materi_plasti_compresion_direct**.

Corrected bug in

**post_point**(under specific conditions the post_point was not located correctly in the elements).

Introduced

**post_group_summed**(number of elements in group 0, group 1, etc.).

Introduced

**test/incremental_driver/triaxial_compression_test_drained_hypo_intergranular_isa.dat**.

Introduced

**group_materi_plasti_hypo_strain_isa**in

**incremental_driver**.

Introduced

**group_materi_plasti_hypo_strain_isa**(hypoplastic law for small strain effects in cyclic loading, extension to intergranular strains).

Changed

**mesh_deform**for

**control_print_gid**i.c.w.

**materi_velocity_integrated**(now consistent with

**materi_displacement**)

Introduced Youtube video tutorials in Examples section.

Introduced

**node_boundary**and

**element_boundary**(tells if nodes and elements are located on the mesh boundary).

Use initial node coordinates in

**control_mesh_cut**(as opposed to previously current node coordinates, which gives unexpected behavior in large deformations).

New arguments in user_failure (user supplied failure routine, eg for erosion modelling)

Corrected license problems when running multiple calculations on one computer.

Corrected bug in

**control_timestep_iterations_automatic**(in rare situations the timestepping did not finish completely).

Introduced

**check_target -no**(neglect any

**target_***records, if needed).

Introduced frequency 0 for

**force_edge_sine**etc.

Introduced

**dtime**(last timestep in calculation, for printing only, eg in a

**control_print_history**to understand how the calculation behaves).

Introduced

**element_group_apply**(yet another method to change the group of elements during calculation).

Introduced

**test/other/interface9.dat**(axisymmetric interface test).

More clear error messages in parallel computations.

Improved stability groundflow calculation for low permeability and capacity.

Improved parallelisation.

Deleted superlu solver (not needed anymore).

Corrected memory leak in

**incremental_driver**(not wrong results, only too much memory usage).

Introduced

**test/other/dynamic8.dat**(2d numerical damping test using materi_dynamic).

Introduced

**test/other/earthquake_2.dat**(open mining pit subjected to earthquake).

Corrected usage

**post_calcul -materi_stress -young_apparent**for very small strains (unreliable results for small strains are prevented).

Introduced

**test/other/mesh_cut_2.dat**(test mesh cut way 2D, equlibrium with nodal force of cut away part).

Introduced

**test/other/mesh_cut_1.dat**(test mesh cut way 1D, equlibrium with nodal force of cut away part).

Introduced

**test/other/dynamic7.dat**(test wave reflection suppression at boundary with special damping properties, hypoplastic law).

Introduced

**test/other/dynamic6.dat**(test wave reflection suppression at boundary with special damping properties, elastic law).

Introduced

**test/other/dynamic5.dat**(test numerical damping in 2d dynamic elastic foundation).

Introduced

**support_edge_normal_damping_automatic_young_apparent**(automatic damping properties at border to prevent numerical reflections in dynamic calculations with nonlinear material laws, eg hypoplasticity).

Introduced

**materi_dynamic**(time integration dynamic calculations with less numerical damping).

Corrected usage

**geometry_method**(it was sometimes neglected).

Introduced

**incremental_driver**in users manual.

Deleted not needed data prints from

**print_data_name**.

Changed

**groundflow_phreatic_level_static_pressure_height_element_group**(more flexible usage, an element group can be specified for each different region).

Introduced

**post_group_volume_summed**(sum of element volumes for each group).

Solved problem with student license mechanism for computer locked licenses.

Corrected bug in

**group_materi_damage_mazars**(wrong results).

Improved stability plasticity iterations for heavily non-associated laws.

Introduced

**test/other/laminate4.dat**(test calculation multilaminate rock with analytical solution).

Introduced

**print_vtk_define**(use defined words i.s.o. geometry names in vtk/paraview plots, e.g.

**left_edge**i.s.o.

**geometry_line 10**).

Introduced

**print_gmsh_define**(use defined words i.s.o. geometry names in gmsh/mecway plots, e.g.

**left_edge**i.s.o.

**geometry_line 10**).

Introduced

**print_gid_define**(use defined words i.s.o. geometry names in gid plots, e.g.

**left_edge**i.s.o.

**geometry_line 10**).

Skipped version numbering, versions are identified by build date from now on.

Introduced for user supplied routines the file

**user.h**in the user supplied version (internal math routines available for user supplied functionality)

Introduced for

**group_materi_elasti_c_direction**automatic normalisation of directions.

Introduced

**groundflow_phreatic_level_multiple_static**i.c.w. non-static phreatic lines.

Introduced

**groundflow_phreatic_level_static_pressure_height_element_group**(restrict user specified static height to specific element group).

Introduced suppressing all hydraulic heads etc. for

**groundflow_apply -no**.

Skipped beta numbering in versions, only stable versions from now on.

Introduced

**support_edge_normal_density**(distributed density on a support edge)

Introduced abaqus wheatstone bridge example in the examples section (automatically convert mesh to Tochnog).

Introduced abaqus bolted pipe joint example in the examples section (automatically convert mesh to Tochnog).

Introduced geolink/tunnel example in the examples section.

Corrected bug in

**group_materi_history_variable_user_parameters**(parameters not transferred to routine)

Introduced mecway - tochnog 'manual meshing 3' in the examples section.

Introduced mecway - tochnog 'basic graphics tutorial' in the examples section.

Introduced geolink/tank example in the examples section.

Introduced

**group_materi_failure_user**(user supplied routine for element failure and deletion)

Corrected bug in

**control_mesh_rotate**(sometimes wrong element connectivity generated)

Introduced geolink/bridge example in the examples section.

Introduced

**group_materi_plasti_mohr_coul_reduction_direction ... -automatic**(automatic direction vector for isoparametric slip formulation).

Introduced

**group_materi_elasti_c_direction**(optional local axes for

**group_materi_elasti_c**).

Introduced

**group_materi_elasti_c**(direct specification of material stiffness matrix, allows for any kind of anisotropy).

Corrected bug reading plate thickness for

**input_abaqus_***(the thickness was neglected)

Corrected bug when combining

**control_distribute ... -node_dof ...**and

**control_reset_dof**(wrong values).

Introduced

**post_calcul_safety_default**(default lifting and piping safety for small pressures).

Introduced

**node_dynamic_pressure**(user specified dynamic pressure in a node).

Introduced

**node_static_pressure**(user specified static pressure in a node).

Introduced

**node_total_pressure**(user specified total pressure in a node).

Introduced

**control_print_partialname**(print multiple records with the same starting partial names).

Introduced

**tochnog/tools/other/gmake.exe**(e.g. use it to run in tochnog/test/other tests with

**gmake**).

Improved speed linear calculations.

Improved pardiso solver parallelisation.

Improved speed heavy parallel computations.

Introduced

**control_print_number_iterations**(print iteration number, convenient for very large calculations).

Introduced

**tochnog/test/other/smc_1.dat**(example Strong Motion CD file, analytical solution signal).

Introduced

**tochnog/test/other/smc_2.dat**(example Strong Motion CD file, earthquake signal).

Introduced

**bounda_found**(indicates if

**bounda_***are actually used at some nodes, for printing only).

Introduced

**input_abaqus_mesh**(use only the mesh data from the abaqus file, nothing else).

Introduced all area integrals like

**force_edge_***etc. with lobatto integration

**group_integration_method ... lobatto**.

Corrected bug in

**control_print_dof_line ... -sequential**(incorrect sequential numbering of files).

Corrected bug in

**group_groundflow_expansion**(wrong results).

Introduced running Mecway under linux in the Tochnog - Mecway manual.

Introduced

**geometry_moving ... -geometry_point**(move a point through space and automatically excavate FE mesh; for complex meshes in complex material layers).

Introduced

**geometry_triangle**for

**geometry_moving**(triangle excavation shape moving).

Introduced

**geometry_quadrilateral**for

**geometry_moving**(quadrilateral excavation shape moving).

Introduced

**geometry_hexahedral**for

**geometry_moving**(hexahedral excavation shape moving).

Introduced

**geometry_thetrahedral**for

**geometry_moving**(thetrahedral excavation shape moving).

Introduced

**tochnog/test/other/geometry_moving1.dat**(example of geometry moving through arbitrary mesh and excavating the mesh).

Introduced

**group_materi_plasti_mohr_coul_reduction**(interface behaviour inside isoparametric element, including friction angle, cohesion and dilatancy).

Introduced tension cutoff limit in

**group_materi_plasti_mohr_coul_reduction**(interface tension cutoff inside isoparametric element).

Introduced

**test/other/mohr_coulomb_reduction_1.dat**and

**test/other/mohr_coulomb_reduction_2.dat**(tests mohr coulomb interface slip on boundary or between material groups).

Introduced

**node_convection_apply**(de-activate convection contributions in a specific node).

Introduced

**group_materi_plasti_pressure_limit_method**(select coordinate component to switch off plasticity near free surfaces).

Introduced

**mpc_element_group_closest**(if no target element is found, use the closest target element to generate mpc's).

Corrected bug printing interface elements in

**control_print_vtk**,

**control_print_gmsh**and

**control_print_tecplot**

Interface with Mecway 3.0 , see http://mecway.com

Gmsh and Mecway manuals on internet on the manuals page.

Introduced

**input_abaqus_group**(convert, or convert not,

**group_***data from abaqus to tochnog).

Introduced

**node_mass**and

**node_damping**for

**input_abaqus**conversion.

Introduced

**spring1**and

**spring2**for

**input_abaqus**conversion.

Introduced

**truss**and

**truss_beam**for

**input_abaqus**conversion.

Introduced

**node_mesh**(specify mesh follow material or fixed in space per node).

Introduced

**control_mesh_remove**(remove elements if they are completely covered by other elements).

Introduced

**control_mesh_remove_geometry**(restrict geometry for applying

**control_mesh_remove**).

Introduced

**control_mpc_element_group**(optionally ask for

**mpc_element_group**to be evaluated each timestep).

Introduced

**group_materi_plasti_mpc**(reduced plasticity in elements attached to mpc's).

Introduced combined lagrangian - eulerian calculations (for selected customers only).

Improved error messaging for

**input_abaqus**conversion.

Improved linux executable speed.

Improved ms windows executable speed.

Introduced 32 bit arm excutables (selected customers only).

Parallel implementation

**control_mesh_remove**.

Parallel implementation

**control_mpc_element_group**.

Corrected bug in

**control_mesh_change_element_group**(only make

**element_group**records for existing elements).

Improved parallelisation speed up..

Introduced

**control_mpc_element_group_frequency_timestep**and

**control_mpc_element_group_frequency_timeinterval**(selective application of

**control_mpc_element_group**).

Introduced

**control_mesh_remove_frequency_timestep**and

**control_mesh_remove_frequency_timeinterval**(selective application of

**control_mesh_remove**).

Introduced

**mpc_element_group_dof**(selective dofs to be mpc'd for

**mpc_element_group**).

Introduced

**plasti_reduction_factor**plotting in gid (reduction plastic parameters from

**group_materi_plasti_bounda**,

**group_materi_plasti_element_group**etc.).

Introduced plotting of geometries in gid plots.

Better naming convention in gid plots for

**post_calcul**results.

Introduced

**post_element_force_force**(add external forces like gravity and edge loads etc. to

**post_element_force**results).

Introduced

**post_element_force_inertia**(add inertia force to

**post_element_force**results).

Introduced

**post_element_force_multiply_factor**(change result

**post_element_force**to other units or other sign).

Introduced

**test/other/force16.dat**(test

**post_element_force**in calculation with gravity).

Introduced

**test/other/force17.dat**(test

**post_element_force**in calculation with gravity and inertia).

More clear manual for

**post_element_force**and

**control_print_vtk**.

Introduced

**post_data**(follow result of summed data items with multiplication factor, e.g. for plotting summation of forces in time).

Introduced

**control_print_vtk_node_method**(specify the name of the node record to be used for the coordinates in the vtk file).

Corrected excessive memory usage

**control_mesh_macro**when many records are used.

Introduced tensors from

**post_calcul**as plots for

**control_print_vtk**.

Improved

**control_mesh_macro_concentrate**(start and end concentration possible).

Introduced

**condif***edge contributions in 1D (

**condif_convection_edge_normal**etc.).

Introduced

**groundflow***edge contributions in 1D (

**groundflow_flux_edge_normal**etc.).

Installed latest pardiso solver for

**solver -matrix_pardiso**.

More clear README_UMAT_USER.txt (better explanation input file for user supplied umat).

Introduced as extra post-processing for

**group_materi_plasti_hypo_wolffersdorff**the density index I_d = (ec-e)/(ec-ed).

Introduced

**group_materi_plasti_hypo_void_ratio_linear**(optionally approximate void ratio change with linear expression).

Changed definition of tochnog materials in gid.

Beta versions are now complete with manuals, test files, gid interface files, etc..

Introduced

**test/other/earthquake_1.dat**(example earthquake response deep sea soil column).

Introduced

**test/other/slope_nonlocal_refine.dat**(example slope intial instability, non-local plasticity, automatic mesh refinement).

Allow more long strings in

**abaqus.inp**for

**input_abaqus**.

Increased maximum length of most data items.

Upgraded user supplied distribution to Linux Mint 17.1 rebecca.

Introduced

**element_intpnt_method**(contains integration method used in element, for printing only)

Introduced

**element_intpnt_npoint**(contains number of integration points used in element, for printing only)

Introduced

**dof_principal**(record indicating if dof's of

**dof_label**are principal dof like velocity, temperature and hydraulic head)

Introduced

**element_intpnt_h**(contains for an element the interpolation polynomial in all integration points for all nodes)

Introduced

**element_intpnt_iso_coord**(contains for an element the isoparametric coordinates in all integration points for all nodes)

Introduced

**test/other/interface13.dat**(shear of interface placed under angle in x-y plane).

Introduced

**test/other/pridbs2.dat**(test restarting from dbs file in solid mechanics).

Improved

**tools/parameter_variation/parameter.cpp**(parameter variation example).

Introduced

**-element_group**,

**-element_geometry**and

**-geometry_set**for

**bounda_dof**(specify boundary conditions with element groups or element geometries).

Introduced

**test/other/slope_classical_numerical.dat**(compare classical slip line theory with numerical calculation).

Extended

**bounda_sine**with constant static loads.

Corrected bug in

**print_filter**for

**node_dof_calcul**and

**post_point_dof_calcul**.

Changed default for

**print_gid_old**to

**-no**.

Introduced

**control_print_database_method ... size_tot**(print size of all database records in the database).

Introduced

**control_print_database_method ... size_tot_large**(print size of database records larger then 1 Mb in the database).

Introduced

**List input files with options**in the user manual (search input files in the distribution containing several words).

Introduced

**tochnog/test/other/foundation_consolidation_settlement.dat**(settlement of foundation due to phreatic level lowering).

Improved

**input_abaqus**(reading abaqus node tables with less coordinates than the number of dimensions).

Introduced

**tochnog/test/other/abaqus1*.dat**(test

**input_abaqus**with boltpipeflange_3d_solidgask.inp).

Improved error checking for

**input_abaqus**.

Introduced

**control_print_gmsh_dummy**(activate or suppress dummy elements in gmsh post processing files).

Corrected bug in

**control_print_gmsh**i.c.w.

**control_print_gmsh_element_data ... -no**(wrong $ElementNodeData format).

Improved

**input_abaqus**and

**control_print_gmsh**for Mecway interfacing (http://mecway.com).

Introduced

**check_warning**(suppress, or do not suppress, warnings).

Introduced

**post_node_rhside_ratio_method**(allow for alternative definition of this error measure).

Introduced

**post_node_factor**(allow for multiplication factor for

**post_node**).

Introduced

**control_mesh_keep_geometry**(keep only elements inside a geometry, convenient to plot details in structure).

Introduced

**-element_geometry**as option for

**bounda_dof**(specify conditions for element geometry regions).

Introduced

**tochnog/test/other/large2.dat**(test computer speed and memory usage with large consolidation calculation).

Introduced

**tochnog/test/other/large3.dat**(same as

**large2.dat**but with staggered solution of fields to allow for very large meshes).

Introduced

**node_bounded**(indicate if the dof in a node is set to a bounded value with

**bounde_dof**).

Introduced

**node_bounded_index**(gives the index of the

**bounde_dof**record which actually sets the dof value).

Introduced

**tochnog/test/other/post7.dat**(demonstrate postprocessing of external reaction forces in dynamic calculation).

Introduced

**post_calcul**matrix data plotting for

**control_print_gmsh**(total stresses in groundwater calculations etc.).

Corrected bug in

**group_truss_initial_force**, it was used as stress, it is defined as force however.

Corrected bug in

**post_force_gravity_summed**(wrong postprocessing value, gravity itself was correct).

Introduced

**post_slide_force_summed**(sum of slide forces in global axes).

Allowed

**slide_***in combination with

**solver -none**.

Lower memory usage for

**solver -diagonal**.

Introduced

**tochnog/test/other/diagonal1.dat**(test

**solver -diagonal**).

Installed latest pardiso solver for

**solver -matrix_pardiso**.

Introduced

**post_materi_inertia_summed**and

**post_slide_force_summed**for

**post_global**.

Introduced

**control_data_copy_index**(copy dataitem with index to other data with other index).

Introduced

**control_data_copy_factor**and

**control_data_copy_index_factor**(multiplication factor for copying data).

Introduced

**node_force**(discrete nodal force at a specific node).

Introduced copying

**node_inertia**to

**node_force**with

**control_data_copy**(substitute inertia forces by static forces, d'alembert principle).

Introduced

**control_materi_plasti_hardsoil_gammap_initial**(initial contribution to gammap in hardsoil so it can start with deviatoric stresses).

Changed

**group_materi_umat**development platform to latest linux mint.

Introduced calculation landslide impact force on concrete safety walls.

Introduced

**data_activate_time**(specify specific time for which data can be activated or de-activated).

Introduced indices for

**data_activate_***(allow activation of several items).

Introduced

**data_delete**and

**data_delete_time**(delete data at specified time).

Introduced

**geometry_element_geometry**(limit geometries using the

**element_geometry**records).

Introduced density variations in landslide materials.

Improved efficiency

**control_mesh_truss_distribute_mpc***.

Changed integration scheme

**prism12**interfaces.

Introduced fully implicit time integration convective contributions.

Introduced landslide plots in gmsh.

Only print the right-hand-side (rhside) for materi_velocity and groundflow_pressure and condif_temperature in gmsh.

Better input error checking for

**control_print_history**and

**control_print_data_versus_data**.

Improved tecplot file from

**control_print_tecplot**(smaller, more efficient files)

Introduced

**check_data**and

**control_check_data**(check consistency in-core database during calculation).

Introduced

**print_data_name**(print all allowed names of input file, fast find options).

Corrected bug in

**control_mesh_generate_interface_method**(corrected element group selection).

Changes in license system for slow computers.

Introduced

**geometry_list**(list of specific nodes which together form the geometry).

Introduced in gid generation of

**geometry_list**(impose boundary conditions and edge forces etc. on arbitrary geometries).

Introduced generation of

**geometry_list**for

**input_abaqus**(generate geometry lists from abaqus sets).

Introduced

**input_abaqus_name**(select which abaqus elements are converted into tochnog elements).

Introduced

**input_abaqus_element_group**(select which groups are written).

Introduced

**tools/parameter_variation**(parameter variations in tochnog calculations).

Corrected bug in

**groundflow_flux_edge_normal**.

Introduced

**tochnog_version_beta**(

**-yes**for beta executables,

**-no**for stable executables).

Introduced

**group_materi_umat**in incremental driver (use incremental driver with your own umat.f routine).

Introduced

**post_element_force**for 1D calculations.

Introduced more clear messages on input errors.

Changed

**mesh_keep_node**, now keep all elements which have at least one of the nodes.

Changed

**force_edge_element_side**etc., now allow for multiple elements.

Corrected bug in

**post_bounda_force_summed**i.c.w.

**bounda_save**.

Changed

**control_print_data_versus_data**(keep the results of previous calculation, don't empty file at beginning anymore).

Introduced

**global_post_point**(select if

**post_point**etc. should the determined for the initial start mesh or deformed mesh).

Introduced

**control_print_dof_line_method**(print initial start coordinates or deformed nodal coordinates in files with dof's).

Introduced

**control_timestep_until_***(stop timesteps if minimum or maximum value of data record is exceeded).

Corrected bug in

**control_mesh_refine_locally_only***(record was not used).

Introduced

**control_zip**(automatically zip postprocessing files and databases during the calculation).

Introduced latest pardiso solver .

Introduced

**control_mesh_refine_locally_minimal_size**(minimal allowed element size in local mesh refinement).

Introduced

**control_mesh_refine_locally_only_method**(select if all or any of the element nodes are needed for this only geometry selector).

Introduced

**control_mesh_refine_locally_not_method**(select if all or any of the element nodes are needed for this not geometry selector).

Introduced

**control_mesh_truss_distribute_mpc_exact_minimal_length_connect**(do, or do not, connect trusses passing a small distance in space below a minimal length).

Introduced

**element_force_edge_water**in

**control_print_vtk**.

Introduced

**geometry_method**(select elements completely or partially in a geometry entity).

Extended

**control_print_beam_force_moment**with truss forces as axial force.

Full static c++ code check.

Introduced

**tools**directory in distribution (automatically install new version with one command).

Corrected bugs in

**control_print_vtk**.

Corrected bug in

**groundflow_phreatic_level_multiple_static**(this record was not always detected).

Introduced

**groundflow_phreatic_only**(only groundflow calculation for groups inside multiple phreatic levels).

Introduced

**element_delete_factor**in vtk and gmsh plots (factor that elements are active when being deleted).

Changed

**change_data_item**to allow for changing mutiple numbers in a record at once (convenient for changing phreatic levels etc.).

Introduced

**tochnog/test/other/excavate1.dat**(water filled excavation example).

Improved file read/write on slow disks (by example network disks).

Introduced

**groundflow_phreatic_level_multiple_element_geometry**(select regions for multiple phreatic levels by

**element_geometry**records).

Introduced

**tochnog/test/other/mohr_coul_direct5.dat**(mohr coulomb test with analytical solution).

Changed

**tochnog/test/other/foundation1.dat**(changed parameters; compare with classical Terzaghi solution).

Introduced

**check_memory_usage**(keep record on the amount of memory used by a calculation).

Introduced in

**bounda_dof**specification of

**ttemp**(specify time rate of temperature).

Introduced

**bounda_alternate**(allow for large calculation by alternating boundary conditions, eg 1.2e6 elements on 32GB computer).

Introduced

**tochnog/test/other/alternate1.dat**(demonstrate

**bounda_alternate**).

Introduced

**bounda_constant**(keep unknown constant, thus re-use old value).

Corrected bug in post-processing record

**post_force_volume_summed**.

Improved

**control_print_gmsh**(added labels, vector fields in nodes, etc.).

Introduced

**control_print_gid_dof**and

**control_print_gid_dof_calcul**(select fields to be written to gid files).

Introduced

**control_print_gmsh_element_group**(select groups to be written to gmsh files).

Introduced

**control_print_gmsh_defomed_mesh**(plot on deformed mesh or initial mesh).

Introduced

**print_gmsh_calculation**,

**print_vtk_calculation**and

**print_tecplot_calculation**(print, or do not print, gms, vtk and tecplot plot files after calculation).

Introduced axisymmetric spring elements.

Introduced

**bounda_save**and

**control_bounda_save**(save calculation time analysing boundary conditions).

Introduced plotting active multi-point-constraints in gmsh and vtk.

Introduced plotting node boundary indicator in gmsh and vtk.

Introduced

**print_node_geometry_present**and

**print_element_geometry_present**(list in database for each node and element in which geometries they are present in the records

**node_geometry_present**and

**element_geometry_present**).

Introduced gmsh and vtk plotting of nodes and elements present in geometries (convenient to check the geometries in your input file).

Introduced all data without index and 1 long as environment symbol (eg

**PROCESSORS 1**,

**PRINT_GID_CALCULATION -no**and

**PRINT_GMSH_CALCULATION -yes**). See section

**Environment symbols**in the chapter

**Final topics**.

Introduced

**print_group_data**for gmsh plots (see in gmsh values for

**group_***values per element, check your dependencies, etc.).

Introduced

**print_group_data**results as

**element_print_group_data_value**records in the dbs file (manually check if your group data is like you want per element).

Introduced

**node_rhside**result plots in gmsh (these are external forces at nodes of prescribed displacements, or water influx at nodes of prescribed pressure, etc.).

Introduced incremental driver in order form.. Example pictures in

**Incremental_Driver**homepage section, and input files in the

**test/incremental_driver**distribution directory.

Faster license check (speed up calculations).

More clear error messages.

Simpler makefile's in tochnog/test/* directories.

Corrected maximum element matrix length for

**bounda_dof ... -veln**.

Introduced

**post_calcul_static_pressure_height**(allow for static pressure reference height different than a phreatic level).

Introduced

**check_nan**(check for Not A Number, extra test for calculation which have trouble).

Introduced

**-updated_jaumann**for

**group_materi_memory**(classical jaumann updated formulation).

Introduced

**group_materi_plasti_mohr_coul_direct_eps_iter**(iteration break criterium for mohr-coul direct iterations).

Introduced

**area_element_group_interface**(use, or do not use, interface elements in

**area_element_group**record).

Introduced

**control_print_gid_element_group**(select specific element groups for the gid files).

Introduced

**check_solver**(check for zero diagonal terms in solver).

Introduced

**tochnog/test/other/update3.dat**(updated jaumann example).

Introduced

**tochnog/test/other/consolidation_gibson.dat**(2d plane strain consolidation benchmark, gibsom et al 1970).

Introduced

**tochnog/test/other/consolidation_gibson_symmetric.dat**(2d plane strain consolidation benchmark, gibsom et al 1970, symmetric pardiso).

Updated gid - tochnog preprocessor interface. Updated gid manual.

Corrected in

**control_materi_plasti_hypo_pressure_dependent_void_ratio**.

Slightly improved convergence consolidated groundwater calculations.

Changed default of

**processors_maximum**to

**-yes**.

Changed default

**group_interface_materi_residual_stiffness**to 0.01 (more stable in complex calculations).

Corrected bug in scanning ranges in include files.

Corrected bug in

**mpc_geometry**(sometimes the

**mpc_geometry**with the highest index was not used).

Introduced

**print_gid_coord**and

**control_print_gid_coord**(plot coordinates of nodes in gid, convenient to see height of structures).

Introduced

**icontrol**(last performed control index, convenient for restarting calculation).

Introduced

**solver_pardiso_ordering**and

**control_solver_pardiso_ordering**(allow for more pardiso ordering methods).

Introduced

**node_boundary**plotting in gid (easily see where external boundary of model is).

Introduced

**geometry_boundary**(restrict geometries to either boundary of mesh or inside of mesh).

Introduced

**group_groundflow_total_pressure_factor**(multiplication factor with which pore pressures are used in total stress).

Introduced

**group_materi_total_pressure_minimum**(apply water pressure from maximum water height in tension cracked elements, for critical concrete safety analysis).

Introduced

**group_interface_materi_total_pressure_minimum**.

Introduced

**bounda_water**(easily specify groundwater pressure boundary conditions from phreatic level above mesh).

Introduced

**groundflow_phreatic_level_multiple**for parts of the domain.

Introduced

**groundflow_interface_groundflow_capacity**.

Introduced

**group_materi_plasti_tension_direct_automatic**(automatically place tension limit in apex mohr-coulomb surface).

Introduced

**element_force_edge**and

**element_force_edge_water**plotting in gid (plot size of forces element-by-element, not averaged over nodes).

Introduced

**control_mesh_convert_tria6_tria3**to convert

**tria6**into

**tria3**.

Introduced latest intel mkl library (pardiso solver, distributions, ...).

Introduced defined words in ranges

**-ra ... -ra**(both defined words and 1-level nested defines are allowed).

New options incremental driver.

New definition

**-safety_piping**in

**post_calcul**.

Corrected

**print_gid_group_data**for data with a varying length.

Introduced

**bounda_time_factor**(multiplication factor for loads in time table).

Introduced

**control_materi_viscosity_apply**(switch on or off viscosity).

Corrected water total pressure calculation i.c.w. multi-point-constraints.

Corrected hypoplastic void ratio for large deformations.

Corrected

**post_calcul -young_apparent**(sometimes wrong value)

Changed

**group_materi_damping**(new definition like mass term in rayleigh damping)

Introduced

**group_materi_factor**(specify a factor to allow for different units between material law and remainder input file)

Do not plot inactive elements from

**group_time**anymore in gid.

Corrected

**slide_***contribution to

**-post_node_rhside_ratio**

Introduced

**tochnog/test/other/dynamic4.dat**(node_mass dynamic test).

Introduced

**solver_bicg_***(iterative bicg control options for whole calculation).

Introduced

**control_solver_bicg_***(iterative bicg control options for specific control index).

Introduced interface directions in gid plots.

Introduced pardiso openmp reordering.

Changed

**processors_partition***to default 1 (save computer memory).

Faster license control, speed up calculations.

Updates to incremental driver, options, documentation.

Corrected executable name if there are spaces in the path.

Updates to landslide algorithm, lagrange thickness update slides.

Improved convergence behaviour for groundwater calculations with consolidation and positive overpressures

Improved convergence behaviour for groundwater calculations with consolidation and small water capacity

Introduced printing of executable name in MS Windows.

Improved beta release system (directory structure in zip file, all archives for user supplied routines).

Improved manual part on dynamic calculations (see the

**Final topics**section at the end of the users manual).

Introduced

**input_gmsh**(read mesh from gmsh preprocessor).

Introduced

**control_print_gmsh**(print results for gmsh postprocessor).

Introduced

**control_timestep_reduce_displacement**(take smaller timesteps if the maximum nodal displacement increment is too large).

Introduced

**control_timestep_iterations_extra**(let user decide on extra iteration at end timestep; convenient to prevent numerical damping in dynamic analysis).

Improved

**post_node_rhside_ratio**for explicit dynamic calculations (with mass inertia activated, and using 1 iteration per timestep).

Changed definition of

**post_node_rhside_ratio**(not only reaction forces at fixed nodes anymore but also prescribed external forces like

**force_edge_***).

Changed

**geometry_bounda_factor**into

**geometry_factor**(for more generic use).

Introduced

**geometry_factor**for

**force_edge_***options.

Introduced

**processors_used**(show the amount of processors, threads, that is actually used).

Corrected bug in

**control_print_interface_stress**(wrong printing for 3D interfaces).

Improved

**input_abaqus**(more elements available).

Upgraded

**control_print_tecplot**to newest tecplot version.

Changed format

**tochnog_version**.

Corrected printing of OCR i.c.w.

**group_materi_plasti_hypo_masin_structure**.

Upgraded to latest intel compilers.

Higher level of compiler optimisations (for faster executables).

Improved license mechanism.

Improved executable protection with crypt techniques (

*Please allow for execution if your antivirus under ms windows gives a false positive virus warning)*.

Small manual improvements.

Student licenses available on demand.

**umat.f**compile mechanism more simple.

Introduced

**control_post**and

**control_post_element_force**(optionally de-activate some post commands during timesteps, to save cpu time).

Introduced

**element_middle**(coordinates of element middle, will be filled during calculation, can be used for external postprocessing).

Introduced

**control_data_copy**(copy from one data item to other data item).

Introduced

**materi_acceleration**(initialize material acceleration fields, for dynamic analysis).

Introduced

**bounda_time_smc**(read SMC files for dynamic earthquake analysis).

Introduced

**bounda_baseline_correction**(option to correct specified acceleration signal to prevent artificial drift).

Introduced

**bounda_time_offset**(time_offset for times in bounda_time; convenient for imported external data).

Introduced

**bounda_time_increment**(fixed time_increment for data in bounda_time; convenient for imported external data).

Changed

**control_print_interface_stress**(now also print average interface stresses in the middle of interfaces in 3D).

Changed

**control_timestep_iterations**in such way that in a dynamic analysis there is no numerical damping anymore).

Corrected

**group_interface_materi_plasti_mohr_coul_direct**in 3D (routine did not always converge).

Corrected

**contact_spring**bug in gid plotting.

Changed

**force_edge_water**(now uses

**groundflow_density**and

**force_gravity**).

Deleted

**groundflow_total_pressure_atmosferic_cutoff**(now only use

**groundflow_total_pressure_limit**to define maximum positive pore pressure).

Introduced

**tochnog/test/other/force14.dat**(test force calculation in beam with distributed top load).

Introduced

**tochnog/test/other/force15.dat**(test force calculation in axisymmetric shell with distributed top load).

Introduced

**tochnog/test/other/dynamic1.dat**(test numerical dynamic damping in truss element).

Introduced

**tochnog/test/other/dynamic2.dat**(test numerical dynamic damping in bar element).

Introduced

**tochnog/test/other/dynamic3.dat**(test precribed acceleration on node).

Introduced

**tochnog/test/other/truss14.dat**(test large deformation truss with total lagrange formulation).

Introduced the new incremental driver on the homepage (calculate homogeneous experiments; mohr-coulomb and all hypo laws; fast, parallel).

Deleted printing gid files on error exit (this tended to give problems).

Clearified pardiso internal error messages.

Solved division by zero in hypo laws intergranular strain direction for zero initial intergranular strains.

Implemented error checking for stiffness returned by external umat routines.

Included changes.html in beta distribution (defines which changes are present in the beta distribution).

Better info in case of insufficient computer memory.

Upgraded to intel mkl linux 11.0.0.079 (newest pardiso solver, random distribute, ...).

Updated

**-pardiso**solver to latest version.

Cleaned compiling and linking of user supplied routines

**user.cpp**and

**umat.f**.

Introduced

**area_element_group_sequence_interface**(change groups in time not for interfaces, optional).

Introduced

**control_mesh_delete_geometry_stop_geometry***(select specific regions to stop deleting elements).

Introduced

**mesh_interface_triangle_***(automatically generate interface elements in a specified triangulated plane in 3d tet4 mesh).

Introduced

**force_gravity_geometry**(limit the gravity force to elements inside a geometry).

Introduced

**tochnog/test/other/ground11_nonsaturated.dat**(example calculation with cycling water level using nonsaturated soil).

Introduced

**tochnog/test/other/ground11_phreatic_level.dat**(example calculation with cycling water level using phreatic level).

Introduced

**tochnog/test/other/laminate3.dat**(example calculation with mohr-coulomb plasticity in crossing laminates).

Introduced

**tochnog/test/other/interface12.dat**(example calculation force transmission in quadratic interface element).

Introduced

**tochnog/test/other/ground12_dupuit.dat**(well groundflow calculation, prescribed well pressure, calculated flux, validation against analytical solution).

Introduced

**control_system_call**(perform a system call, eg send an email that the calculation reached a certain point).

Introduced tochnog archive 64 bit in distribution (for umat users).

Set in GID groundwater pressure to null in nodes without groundwater elements.

Corrected bug in tables for very large numbers (e.g. 1.e20).

Better error checking.

Cleaned makefile for test calculations.

Improved landslide algorithm (consultancy only).

Improved memory usage for single processor calculations.

Introduced

**control_safety**for axisymmetric calculations.

Introduced

**matrix_superlu**solver for linux 64 bit.

Introduced

**groundflow_flux_edge_normal_***(prescribed distributed water fluxes on edge domain).

Changed

**control_print_interface_***(now also for partial section of interface elements).

Changed time integration hypoplastic intergranular strains (the old routine had problems for some examples).

Clearified compilation of user supplied

**umat**routines.

Corrected bug in

**processors_maximum**.

Better error checking.

Introduced

**node**as geometry entity.

Introduced

**control_print_vtk_empty**(include, or do not include, empty elements in vtk files).

Introduced

**group_materi_elasti_shear_factor**(multiply shear stiffness with factor; convenient to get low shear stresses in calculation).

Introduced

**strain_settlement_***(prescibed settlement strains, eg for road buiding etc.).

Improved

**input_abaqus**with better error checking.

Improved

**input_abaqus**with data reading.

Automatic conversion of windows format

**abaqus.inp**to linux format for

**input_abaqus**

Better

**tochnog.gid**files for ms windows (interface with gid).

Introduced

**dos2unix**in the tools directory tool on our ftp server (convert windows text files to linux text files).

Introduced

**control_mesh_macro_concentrate**(concentrate element fineness somewhere in macro region).

Introduced

**group_truss_elasti_elongation_force_diagram**(truss elongation versus force, typically obtained from supplier tables).

Introduced

**processors_maximum**(switch to set the number of processors automatically to its maximum).

Introduced

**tochnog_processors_maximum**as environment symbol (switch to set the number of processors automatically to its maximum for all calculations).

Deleted

**group_interface_materi_plasti_mohr_coul**and

**group_interface_materi_plasti_tension**(always use the

**group_interface_materi_plasti..._direct**).

Fixed system error message on ubuntu systems (just redundant message, did not obstruct calculation).

Changed distribution CD's; more clean and clear structure.

Better input error checking.

Better parallelisation for nonlinear calculations.

Tochnog has been ported to android phones/tablets.

Introduced secure internet page for clients distribution downloads.

Introduced

**processors_partition**(set in detail how the element loop is parallised)

Introduced end time in

**force_edge_sine**and

**force_edge_normal_sine**(eg end time in shake functions in earth quake analysis)

Introduced

**control_print_materi_stress_force**(print forces and moments in convenient ascii files)

Improved

**solver -matrix_iterative_bicg**for large stiffnesses (beams, truss, interfaces, ...)

Introduced

**input_abaqus**(transfer abaqus input files to tochnog input files).

Introduced

**force_edge_element**etc. (select specific elements for imposing edge forces etc.).

Introduced

**solver_pardiso_processors**(set the number of processors to be used by pardiso).

Introduced

**geometry_line_eps_iso**and

**geometry_triangle_eps_iso**and

**geometry_quadrilateral_eps_iso**(tolerance on isoparametric coordinates of geometries).

Introduced

**post_point_eps_iso**(tolerance on

**post_point**to be located in an element).

Introduced

**mpc_element_group**(generate mpc's between two element groups, attach one group to other group).

Introduced

**slide_plasti_tension**(maximum tensile force in slide boundary).

Introduced

**control_mesh_renumber_element_geometry_offset**(offset in element geometry numbers when renumbering mesh).

Introduced

**control_mesh_renumber_element_group_offset**(offset in element group numbers when renumbering mesh).

Introduced

**control_mesh_truss_distribute_mpc_unknown**(select unknowns to mpc in distribution of trusses over isoparametric elements).

Introduced

**control_mesh_change_element_group**(change group number of elements).

Introduced

**mpc_element_group_geometry**(select a geometry for

**mpc_element_group_geometry**).

Introduced

**truss_beam**elements as option for

**control_mesh_truss_distribute_***(generate mpc's between truss beams and isoparametric mother elements).

Introduced plotting of mpc indicator in gid.

Improved calculation outward normals at boundary (used in several algorithms, e.g. contact).

Improved input checking.

Corrected

**control_print_history**(array bound exceeded for long records).

Corrected

**post_point**(the post point was not found for some elements in some meshes).

Introduced

**geometry_circle_part**(part of a circle, between two angles).

Introduced

**control_mesh_duplicate_element_group**(duplicate elements from old group to new group, same nodes).

Introduced better input error checking.

Introduced

**bounda_print_mesh_dof_***and

**print_mesh_dof**(print result fields in a first calculation, and use as prescribed values in following calculations).

Changed

**group_materi_elasti_k0**, now allow i.c.w.

**group_materi_elasti_hardsoil**.

Introduced

**prism6**and

**prism15**in gid pre-processing.

Introduced

**groundflow_seepage_eps**(specify tolerance when seepage condition is active).

Introduced

**group_materi_elasti_young_user_parameters**(input file defined parameters for user supplied routine Young modulus).

Introduced

**group_materi_history_variable_user**(user supplied routine for history variables).

Introduced

**support_edge_normal_plasti_friction**(maximum mohr-coulomb friction force in

**support_***).

Introduced

**support_edge_normal_plasti_tension_double**(specify double value for the support tension plasticity).

Introduced

**support_edge_normal_time**(specify time factor for

**support_edge_normal**, eg excavate support with this).

Introduced

**support_edge_normal_force_initial**(initial normal force in supports).

Introduced

**area_element_group_unknown_***(change

**element_group**depending on a solution field).

Introduced

**area_element_group_element**(select element name for

**area_element_group_***action).

Made

**-element_geometry**available in

**area_element_group**.

Corrected user supplied routines

**user_interface_materi_stress_displacement**and

**user_plasti**.

Corrected printing

**element_group**in

**control_print_vtk**.

Introduced

**control_data_activate**(active or de-activate data in a calculation).

Introduced

**control_print_dof_point**(print in a point the dof values , interpolated from elements).

Introduced

**control_print_interface_stress**(print in 2D interface stresses between a start point and end point).

Introduced

**control_mesh_generate_interface_method**(use either

**element_group**or

**element_geometry**for specifation of interface generation).

Introduced

**control_solver_pardiso_metis**(switch metis in pardiso on/off).

Changed

**control_mesh_generate_interface**(sequence of interface node connectivity, so that gid makes better line diagrams).

Introduced

**control_mesh_convert_quad9_quad6**(convert

**quad9**elements into

**quad6**elements).

Introduced

**group_interface_materi_plasti_mohr_coul_direct**(direct mohr coulomb implementation for interfaces, similar to isoparametric elements).

Introduced

**group_materi_umat_pardiso_decompose**(umat routines can activate or de-activate pardiso LU decomposition).

Introduced

**group_plasti_apply**(activate or de-activate plasticity in a group, if needed for some reason).

Improved

**group_materi_plasti_hypo_***(speed improvement).

Introduced

**mesh_activate_gravity_plasti_apply**(activate or de-activate plasticity while applying

**mesh_activate_gravity_***).

Introduced

**mesh_activate_gravity_method**(several methods for mesh activation in dam building etc.).

Introduced

**node_support_edge_normal_plasti_tension_status**(contains after calculation the status of nodes for

**support_edge_normal_plasti_tension**option).

Introduced in

**print_where -yes**printing of pardiso decomposition and back substitution phase.

Changed

**post_element_force_***, now use elements at both sides to determine forces and moments.

Changed

**tochnog.gid/***files; now specify group names in gid preprocessor.

Changed parallelisation, more efficient with combined nonlinear and linear areas.

Introduced

**support_edge_normal_plasti_residual_stiffness**(influence the iteration behaviour of supporting edges by adding residual stiffness in plasticity).

Introduced

**post_calcul_materi_stress_force_direction_include_epsilon**(more flexible selection of surfaces for force and moment calculation).

Introduced

**control_timestep_adjust_minimum_iterations**(optionally alllow tochnog to set the minimum number of iterations if that is needed for convergence or so).

Introduced

**group_materi_elasti_young_power_eps**(limit pressure in young power law to prevent trouble at low stress levels).

Introduced

**group_materi_plasti_pressure_limit**(neglect plasticity near free surfaces, in case of trouble).

Introduced

**control_bounda_relax**(slowly relax imposed boundary conditions, like for instance prescribed displacements).

Introduced

**post_calcul_materi_stress_force_average**(average forces and moments for hex27 internal nodes, then all nodes get force/moments, more nice plots etc.).

Introduced ranges in

**control_data_arithmetic**.

**control_mesh_truss_distribute_mpc_***bug for more than one truss

Changed

**group_materi_plasti_hardsoil**implementation (more stable convergence).

**control_timestep_iterations_reduce_automatic***bug for a low number of maximum iterations

Introduced

**group_materi_elasti_borja_tamagnini**nonlinear soil elasticity.

Introduced

**group_materi_plasti_generalised_non_associate_cam_clay_for_bonded_soils**for cohesive soil like materials.

Introduced

**group_truss_expansion**(thermal expansion coefficient for trusses).

Introduced

**group_truss_initial_force**(initial force in truss elements).

Introduced

**hex20**plotting in gid (not mapped to a linear anymore, but full quadratic plotting).

Introduced

**post_calcul_limit**(lower and upper allowed values for

**post_calcul**results).

Introduced

**groundflow_pressure_gradient**in initialisation part (gradient of hydraulic head).

Introduced

**solver_pardiso_out_of_core**to switch on out-of-core for the pardiso solver.

Introduced

**print_gid_calculation**set to

**-no**if you never want to print the files for gid.

Introduced

**control_timestep_reduce_automatic_***(new automatic timestepping method, use equidistant smaller timesteps).

Introduced

**control_truss_distribute_***(automatic redistribute truss over isoparametric elements, connect with mpc's, for reinforcement modelling).

Introduced

**truss_bond_slip***in initialisation part (allow for bond slip between reinforcement trusses and concrete mother elements).

Skipped

**tendon_***, use

**control_truss_distribute_***instead.

Skipped

**calcul_length**(now automatically done by tochnog).

Changed

**tochnog_version**(new system for version numbering).

Changed

**problemtypes/tochnog.gid**files in the gid installation (please update these files).

Changed memory usage, more efficient.

Changed the final topics section in the user manual (better tips to check your calculation and prevent trouble).

Introduced extra stability for highly nonlinear calculations.

Starting from version 5.2 also a bug list will appear in this changes list.

Introduced

**group_interface_materi_elasti_stiffness_normal_diagram**records (varying normal stiffness in interface elements).

Changed

**control_mesh_generate_interface**(allow for combinations of element groups).

Introduced possibility to read

**node**records with two values in a 3d input file (convenient i.c.w.

**control_mesh_extrude**).

Introduced

**materi_updated_apply**and

**control_materi_updated_apply**(easily switch on/off updated lagrange large deformations).

Introduced use of a

**geometry_line**in 3D to impose distributed forces on a line.

Introduced

**dependency_method**and

**dependency_geometry**(use dependency factors, and select geometry).

Introduced

**control_mesh_map**(for very large linear calculations, first solve with linear elements, then map to quadratic elements).

Introduced

**condif_heat_volume_user**(user supplied heat source).

Changed

**mpc_geometry**(specify a geometry for which all nodes get equal unknown values like displacements, etc).

Introduced

**mpc_geometry_method**(more methods to mpc's).

Changed use of

**control_mesh_rotate**i.c.w.

**control_input**(input 3d data after mesh rotation for axisymmetric to 3D).

Changed

**control_mesh_rotate**for interface elements (interface element data is now also rotated to 3D).

Introduced

**control_mesh_rotate_angle**(rotate only up to a certain angle, eg 90 degrees, or 180 degrees).

Introduced

**control_timestep_iterations_automatic_stop ... -no**(finish current timestepping when minimal timestep size is reached).

Changed

**control_distribute_correlation_length**(different correlation length in each space direction, by example in horizontal layer direction versus vertical direction).

Changed

**control_mesh_generate_interface_element_group**(normal direction always from group 0 to group 1, convenient for post output interpretation).

Changed

**group_materi_elasti_young_power**(made the young based on a power law available for GID plotting).

Introduced

**geometry_cylinder_part_start_vector**(choose parts of arbitrary cylinders in space).

Introduced

**dependency_number**(make only a specific number in a record dependent).

Introduced

**dependency_type**(optionally use consinus, sinus, or tangent dependencies).

Introduced prisma elements in GID plots (the latest GID versions support these elements).

Introduced plotting unbalans in GID plots for convection-diffusion equation (convenient for freezing calculations with highly nonlinear capacity).

Introduced

**group_interface_condif_conductivity**(conductivity in interface element)

Introduced

**group_interface_materi_expansion_normal**(thermal expansion in interface thickness direction)

Introduced

**group_interface_materi_stress_displacement_normal_diagram**(diagram for interface normal displacement - force relation)

Introduced

**group_interface_materi_stress_displacement_tangential_diagram**(diagram for interface tangential displacement - force relation)

Introduced

**group_materi_plasti_hypo_masin**and

**group_materi_plasti_hypo_masin_structure**(hypoplasticity model tuned for clays).

Introduced

**group_groundflow_expansion**(thermal stress in groundwater due to expansion coefficient)

Introduced

**group_materi_plasti_hypo_masin_ocr**(specify OCR for hypoplastic clay law)

Changed

**group_condif_conductivity**(different conductivity in each space direction)

Introduced

**tutorial 4**(sheet pile calculation with automatic interface element generation).

Introduced

**control_distribute_correlation_length**(random distributed element and nodal data with correlation length; get a feeling how safety factors depend on varying cohesion and friction angle etc.).

Introduced

**safety_slip_ellipsoide_***(ellipsoide surface for easy 3D slip safety analysis).

Introduced

**materi_plasti_max_iter**(set maximum number of plastic iterations on integration point level; convenient for getting plots of plastic f with 0 iterations, view easily high risk zones in plots with a linear elastic gravity calculation only)

Introduced

**post_calcul_multiply**(multiply calculated data with a factor, convenient if you need to redefine with that factor)

Introduced extra error checking input file.

Improved input error checking.

Changed format

**materi_plasti_hypo_history**in initialisation part.

Changed

**post_element_***(now normal force, shear forces and moments in user defined cross sections).

Introduced

**tutorial 4**in the tutorial manual (demonstrates automatic interface element generation between material groups).

Introduced

**control_input**(append a new piece of input file at some stage of the calculation).

Introduced

**post_bounda_force_summed**(sum of

**bounda_force**records).

Introduced

**groundflow_phreatic_level_static**and

**groundflow_phreatic_level_multiple_static**(take pore pressures equal to static pressure).

Introduced

**control_mesh_generate_interface**(automatic generation of interfaces on geometries or between element groups).

Introduced

**control_mesh_keep_element**,

**control_mesh_keep_element_group**and

**control_mesh_keep_node**(skip all but a small part of the mesh; easy for studying local mesh in plots).

Introduced

**windows 64 bit x86-64 version**(for MS windows users with large problems, eg larger than 2Gb memory).

Introduced

**safety_slip_grd**(grd surface for 3D slip safety analysis, golden software surfer format).

Introduced

**safety_slip_circle_grid**and

**safety_slip_circle_line**(slip circles for 2D slip safety analysis).

Introduced

**hex20**and

**prism15**elements.

Introduced

**linear_calculation_apply**(neglect all non-linearities in the input file; convenient for testing the input file without skipping non-linearities by hand.)

Introduced

**materi_stress_pressure_history**and

**group_materi_stress_pressure_history_factor**(easy modelling of different soil stiffness in loading and unloading/reloading; combine with mohr-coulomb etc.)

Introduced

**element_geometry**(define a set of elements as geometry. Use in area_element_group_sequence_geometry etc.)

Introduced

**group_spherical**(sphere coordinates r, phi, theta; for spherical stress, temperature, water, wave calculations)

Introduced

**control_safety_slip**,

**safety_slip_circle_***,

**safety_slip_combined_linear_***,

**safety_slip_multi_linear_***etc. (easy and fast geotechnics safety factor calculations using gravity stresses only; visualise slip circles in gid)

Introduced

**change_dataitem_time_method**(change the tangent, sinus or cosinus of a data item; typically convenient for changing the friction angle in safety factor calculations)

Introduced

**post_calcul -materi_stress -k0**(calculate ratio of horizontal stresses and vertical stresses, i.e. k0 in a geotechnical calculation)

Introduced

**control_data_save**and

**control_print_gid_save_difference**(save a status of strains, stresses etc. and see in gid later differences relative to that status)

Introduced

**support_edge_normal_damping**and

**support_edge_normal_damping_automatic**(damping in support conditions at boundaries; for absorbing boundaries in earthquake analysis etc.)

Improved

**control_mesh_convert**. Now also convert

**-bar2**to interface

**-quad4**,

**-bar3**to interface

**-quad6**,

**-quad4**to interface

**-hex8**,

**-quad8**to interface

**-hex18**and

**-quad9**to interface

**-hex18**. (Easy interface generation in meshes. Eg use GID to generate

**-bar2**in the mesh, use

**control_mesh_extrude**to extrude to

**quad4**elements, use

**control_mesh_convert**to convert to

**hex8**interface elements).

Introduced

**group_materi_plasti_compression_direct**and

**group_materi_plasti_mohr_coul_direct**(stable and fast cutoff stresses for compression limit and mohr-coulomb criterium)

Changed

**group_materi_elasti_tension**into

**group_materi_plasti_tension_direct**(name change only). Recommend use of

**group_materi_plasti_tension_direct**i.s.o.

**group_materi_plasti_tension**

Improved stability plastic iterations for all

**group_*_plasti_***.

Improved

**solver -matrix_iterative_bicg**in combination with

**solver_matrix_symmetric -yes**(faster, less memory).

Changed

**check_element_shape**(now also plot element shape distortions in GID)

Introduced

**slide_user**(user supplied routine for slide friction). Introduced

**node_slide**(specify specific nodes belonging to a slide geometry)

Introduced

**mpc_linear_quadratic**(automatic mpc's for compatibility linear and quadratic elements; allows for quadratic beams elements, quadratic sheet piles, etc. and linear soil elements)

Changed

**control_mesh_macro ... -circle**and

**control_mesh_macro ... -sphere**(improved quality mesh)

Changed

**control_print_vtk**(extensive plotting files for www.paraview.org)

Introduced

**check_element_shape**(check for distorted isoparametric elements)

Introduced

**-matrix_pardiso**solver, skipped previous direct solvers (pardiso runs parallel, and is also available on windows)

Introduced

**control_print_gid_element_group**and

**control_print_gid_element_group_not**(select groups for gid plotting).

Changed extrapolation from element integration point to element nodes (gid plots may change).

Introduced

**control_mesh_extrude_direction**(extrude optionally in y-direction).

Introduced

**group_materi_undrained_capacity**(undrained groundflow analysis without storage equation on system level).

Changed syntax

**control_print_dof**and

**control_print_dof_line**(consistent with

**control_print_gid**etc.).

Introduced

**elasti_tension_apply**and

**control_elasti_tension_apply**.

Improved

**solver_matrix_symmetric**(save memory by symmetric matrix storage and solution; try it for large calculations)

Introduced

**post_element_number**(select specific element numbers for

**post_element**)

Changed syntax hypoplasticity models (for upcoming new models in future releases)

Lower memory usage

Improved parallelisation BICG solver

Changed syntax

**mpc_geometry**(more flexible)

Introduced 3D interfaces in GID

Changed

**control_print_line_coordinates**(printing along muti-linear lines enabled)

Introduced

**group_materi_plasti_hypo_niemunis_visco**(visco hypoplasticity + integranular strains)

Introduced

**-safety_lifting**and

**-safety_piping**for

**post_calcul**(hydraulic safety factors)

Changed defaults for

**mesh**(default now fixed in space)

Changed syntax

**control_print_database**

Changed

**materi_plasti_apply**into

**plasti_apply**and

**control_materi_plasti_apply**into

**control_plasti_apply**(now works on all *plasti* data). Changed

**updated_without_rotation**into

**updated_linear**.

Changed

**force_edge_water**(now always automatically normal to element edge)

Introduced

**control_print_node**(print nodal results in ascii file; automatically order with angle for tunnels)

Introduced

**force_element_edge**etc. for more element types.

Introduced

**control_mesh_merge_geometry**, and renamed

**control_mesh_merge_geometry_not**. (merge or merge not nodes only in certain geometries)

Introduced

**mesh_convert**(automatically convert illegal elements to legal Tochnog elements)

Introduced

**mesh_correct**(automatically correct element connectivity list for interfaces and hinges)

Introduced

**node_rhside_fixed**in gid, (external reaction forces at fixed displacements)

Introduced

**element_beam_direction_z**, (same as

**group_beam_direction_z**, but now per element however)

Introduced

**print_gid_spring2**,

**control_print_gid_spring2**,

**print_gid_contact_spring2**and

**control_print_gid_contact_spring2**(choose for

**spring2**and

**contact_spring2**elements if they should be shown with one or two nodes in Gid).

Changed

**element_force_edge**,

**element_force_volume**etc. (edge and volume loads per element).

Changed

**group_materi_memory**to

**group_interface_materi_memory**for interfaces, etc.

UMFPACK speed up with blas routines (on all linux platforms).

Introduced tutorial manual and validation manual.

Introduced

**groundflow_seepage_geometry**(specify seepage conditions to free air, no flow in and only flow out, automatic determination flow exit point).

Introduced

**-veln**in

**bounda_dof**(zero velocity in normal direction to a plane).

Changed

**inertia_apply**and

**control_inertia_apply**to allow for different activations mass inertia, groundflow capacity, etc.

Deleted

**slide_***(now always use contact_* for contact conditions).

Changed parallel computations (better parallelisation).

Changed

**dependency_item**(all group_* data can now be made also dependent on coordinates).

Introduced

**print_gid_group_data**(plot in gid group data for elements, eg young modulus, permeability, etc.).

Introduced

**group_groundflow_nonsaturated_vangenuchten**(van-Genuchten non-saturated groundflow model).

Introduced

**control_reset_value**,

**control_reset_value_linear**,

**control_reset_value_power**etc. (set dof's to several nonlinear space dependent fields).

Introduced

**post_element_group**(easy force calculation in cross-sections etc).

Changed

**group_truss_plasti**(now separate compression plasticity and tension plasticity).

Introduced

**post_node_rhside_ratio_ignore**(ignore a percentage of nodes with highest out-of-balance, ignore local instabilities).

Introduced

**mpc_node_number**,

**mpc_node_factor**and

**mpc_geometry**(multi point constraints to connect nodal dofs).

Introduced

**control_print_frequency_timeinterval**and

**control_print_frequency_timestep**(more convenient printing of gid, tecplot, etc. for timesteps).

Introduced

**support_edge_normal_plasti_compression**(compression plasticity and mohr-coulomb shear plasticity in supports).

Introduced

**interface_materi_tension_apply**and

**control_interface_materi_tension_apply**(activate or de-activate tension cutoff stress in interfaces).

Introduced

**group_spring_stiffness_nonlinear**(diagram with spring stiffness dependent on spring elongation).

Introduced in GID plot of

**materi_rhside_free**(unbalans forces, look where the trouble is in your model).

Introduced 3d beams (2 bending axes + torsion, in 3d space).

Introduced

**materi_displacement_relative**(initialise relative displacements, that is the extra displacements of the last timesteps).

Introduced

**group_interface_groundflow_permeability**(groundflow permeability in interface elements).

Introduced

**prism6**interface elements.

Introduced

**geometry_bounda_factor**for

**geometry_point**.

Introduced

**interface_damping_apply**and

**control_interface_damping_apply**(activate or de-activate stabilizing damping in interfaces)

Introduced

**control_interface_reset**(reset interfaces strains and stresses to 0 at some point in a calculation).

Introduced

**group_interface_damping**(apply damping to stabilize calculations with interfaces).

Introduced

**group_interface_materi_tension_residual_stiffness**(residual stiffness to stabilize calculations with interface tension failure).

Introduced

**check_element_node**(suppress checking duplicate element nodes).

Introduced plotting of interface strains and stresses in GID.

Introduced

**element_materi_plasti_laminate0_direction**etc. (varying direction of multilaminate plasticity per element).

Introduced

**post_element**(sum or average element forces somewhere in the domain).

Changed automatic default of

**solver_matrix_symmetric**(symmetric matrix solver when possible).

Introduced

**strain_volume_***(impose extra volumetric strain, eg for grouting in soils, etc.).

Default input file

**tochnog.dat**.

Introduced

**force_edge_projected**.

Introduced

**group_materi_elasti_tension**.

Introduced

**solver_matrix_symmetric**.

Introduced

**control_timestep_iterations_automatic_continue**.

Changed default

**post_node_rhside_ratio_dof_type**

Introduced

**geometry_tetrahedral**and

**geometry_hexahedral**

Introduced 64 bit tochnog for Intel Itanium under Linux.

Introduced plotting boundary conditions and external forces in GID (plot

**bounda_dof**,

**force_edge_normal**, etc.).

Introduced

**materi_plasti_hypo_wolffersdorff_history**and

**materi_plasti_camclay_history**(plasticity laws get their own history variables).

Introduced

**tying_linear_quadratic**(automatic compatibility between linear and quadratic elements).

Deleted

**matrix_length**(automatically determined inside Tochnog now).

Introduced external forces in

**post_node_rhside_ratio**definition (specifically usefull if only prescribed external forces, no boundary conditions).

Introduced

**groundflow_phreatic_level_multiple**(multiple phreatic levels between non-permeable layers).

Introduced

**post_calcul -materi_stress -force**(2D and 3D accurate forces and moments in tunnels, sheet piles, etc).

Changed

**groundflow_phreatic_level_bounda**into

**groundflow_phreatic_level_bounda**(preparation multiple phreatic levels).

Deleted

**-matrix_superlu**(always use

**-matrix_umfpack**as direct solver).

Introduced

**post_count**(count active records of data items).

Changed

**control_mesh_delete_geometry_move_nodes**into

**control_mesh_delete_geometry_move_node**(only skipped s).

Introduced 64 bit tochnog for AMD Opteron under Linux.

Lower memory usage.

Introduced dongle locked linux distributions.

Introduced

**control_reset_value_factor**(multiply dof's in element by a factor)

Introduced hinge elements with group_type

**-hinge**(concrete hinges tunnels, 2D&3D)

Introduced interface elements by setting

**group_interface**(friction, gap, 2D&3D, ...)

Changed many data item names.

Introduced

**boundary_factor**(coordinate dependent boundary conditions multiplication factor).

Introduced

**-total_pressure**for

**bounda_dof**(specify groundflow physical pore pressure).

Introduced

**support_edge_normal**etc (elastic distributed support for constructions).

Introduced

**print_apply**(globally de-activate

**control_print_***records).

Deleted

**control_data_put_double_node**and changed

**control_reset_dof**.

Introduced

**condif_heat_edge_normal**and

**condif_heat_volume**(new for temperature).

Changed

**force_edge**and

**force_volume**(now only for material stress).

Introduced

**include**

*filename*(include other files with mesh, etc.).

Introduced

**options_post_node_rhside_ratio -fixed_free_average**(other error definition, for elasto-plastic calculations etc.).

Introduced

**control_print_vtu**(xml plotting files for the free paraview plotting program, recommended).

Introduced

**control_print_gid_method index -elements**(element-by-element strain,stress,... plots in gid consistent with integration point results).

Introduced manuals in pdf format.

Introduced, by example,

**control_data_put 10 -node_dof -all -sigyy**.

Introduced

**print_precision**.

Introduced gauss integration as default for bars, quads and hexahedrals.

Corrected

**control_options_materi_plasti_hypo_wolffersdorff_pressuredependentvoidratio**.

Introduced

**control_options_materi_plasti_hypo_wolffersdorff_distributedvoidratio**.

Introduced, by example,

**control_data_put 10 -node_dof -all -sigxx -sigyy -sigzz**

Good accuracy also for very low groundflow permeabilities..

Introduced UMFPACK direct LU solver (

**options_solver -matrix_umfpack**).

Faster for elasto-plastic calculations.

Introduced gid plotting in 1D problems.

Introduced

**element_intpnt_dof**(solved unknowns in integration points of elements).

Introduced quadratic axisymmetrical elements.

Introduced

**tochnog_version**(version number and build date of the tochnog executable).

Introduced

**control_options_groundflow**and

**options_groundflow**(easy switch off and on groundflow in the input file).

Introduced

**control_mesh_rotate**(easy rotating 2D axi-symmetric mesh and results into a 3D mesh).

Changed

**group_materi_density_groundlow**(now also dependent on total pressure in groundwater, so easily wet soil density in saturated regions and dry soil density in non-saturated regions).

Introduced

**control_options_dependency**(switch dependency diagrams easily on/off).

Introduced

**post_calcul -materi_stress -force**(easy and accurate forces and moments printing and plotting for quad9 elements). (typically used in tunnels where the tunnel lining is build with one row of quad9 elements).

Introduced

**start_if_not ... end_if_not**(conditional parts in input file).

Changed

**options_plasticity**into

**options_materi_plasti**(more logic name).

Introduced

**group_materi_plasti_matsuokanakai_softening**.

Introduced

**control_options_plasticity_visco**and

**options_plasticity_visco**(easy suppressing of visco -lasticity, when needed).

Introduced

**materi_plasti_kappashear**(effective plastic shear strains). This

**materi_plasti_kappashear**is now used in

**group_materi_plasti_mohrcoul_softening**

Changed memory usage. Optimised so that much less fore-ground memory is needed.

Introduced

**prism12**linear/quadratic prism elements (easy for extruded tunnels with linear variation in length and quadratic variation in cross-section).

Introduced

**control_print_unknowns_line**(print

**node_dof**and

**node_dof_calcul**results along a line in space to a file, use gnuplot or excell or so to plot).

Introduced

**group_materi_plasti_laminate***(laminate plasticity model for shear and tension failure of planes, eg in rock).

Introduced

**control_mesh_extrude_contactspring_***(easy contactsprings for imposing displacements in extrude direction).

Introduced

**prism18**quadratic prism elements (easy for extruding

**tria6**into 3D).

Introduced parallelisation on OpenMP systems (shared memory).

Introduced

**contactspring1**and

**contactspring2**(one node and two node contact springs).

Introduced

**group_spring_memory**(memory model for springs).

Introduced

**control_print_gid_qvec**etc. (easy beam moments and force plotting in GID).

Introduced

**print_gid_format**(new format for GID version 7 now available).

Changed

**force_edge_geometry_factor**etc. (extended possibilities in 3D).

Introduced

**geometry_elementgroup**(restrict geometries to specified element groups).

Introduced

**prism6**elements.

Changed labels maxwell stresses to

**-sigm0xx**,

**-sigm0xy**, etc.

Introduced

**group_materi_plasti_visco_power_names**and

**group_materi_plasti_visco_power_values**(different viscoplasticity parameters for each plasticity model).

Introduced

**materi_strain_plasti_compression**,

**materi_strain_plasti_diprisco**

**materi_strain_plasti_mohrcoul**, etc. (plastic strains for each specific plastic model).

Changed definition

**group_materi_plasti_visco_power**.

Introduced easier printing of

**post_calcul**results in

**control_print_history**and

**control_print_data_versus_data**.

Introduced

**control_print_gid_method**(write results to gid files for global nodes or element-by-element).

Introduced

**options_post_node_rhside_ratio**(specify the definition of error ratio, relevant for non-linear calculations).

Introduced in

**dependency_item**the possibility to make all element group data dependent on all

**post_calcul**results.

By example, make elasticity data , plasticity data ,etc. dependent on deviatoric plastic strains , etc.

Introduced

**post_calcul_label**(see names of used

**post_calcul**data).

Changed

**control_print_element**(more easy printing truss normal forces and beam shear forces and beam moments).

Introduced

**node_rhside_static**and

**node_rhside_total**(static forces on nodes, and total forces (static+inertia) on nodes, for printing).

Introduced

**group_contactspring_direction_automatic_planes**(help automatic contact spring direction determination).

Introduced

**global_solver_diagonal_ratio**etc. (estimate condition number of total matrix).

Introduced

**group_contactspring_direction_automatic**and

**control_mesh_generate_contactspring_elementgroup**

(automatic direction in contact springs and more easy generation).

Introduced

**element_empty**and

**control_print_gid_empty**(look behind elements being deleted in GID).

Introduced

**group_materi_plasti_wall**(easy lower friction on walls).

Changed formulation of

**group_materi_plasti_matsuokanakai**.

Introduced

**control_materi_elasti_k0**and

**group_materi_elasti_k0**(easy imposing K0-stresses in geotechnics).

Introduced

**global_force_edge**,

**global_force_edge_normal**and

**global_force_edge_water**(sums of external forces for checking).

Introduced

**control_mesh_extrude_elementgroup_new**(different new element groups in 3D extrusions per element group).

Introduced

**force_edge_elementgroup**,

**force_edge_normal_elementgroup**etc. (select element groups for forces).

Introduced

**control_mesh_extrude_elementgroup**(different 3D extrusions per element group).

Introduced

**options_matrix_save**(faster calculations, specifically elasto-plastic).

Introduced

**options_element_dof**(save strains, stresses etc. per element).

Introduced

**control_print_beam_moment**(easy moment lines in beams).

Introduced

**element_dof_initial**and

**group_dof_initial**(initial unknowns for elements).

Introduced

**group_materi_plasti_hardsoil**plasticity model.

Introduced

**control_mesh_delete_geometry_projectiontype**(delete inside or on edge).

Introduced minimal timestep size in

**control_timestep_iterations_automatic**.

Changed several

**force_element_***into

**force_***.

Changed

**group_axisymmetry**formulation.

Changed definition normal in

**force_element_edge_normal**.

Changed default to

**-matrix_superlu**solver.

Changed several

***options_skip***into

***options***.

Skipped

**control_mesh_new_mesh**(was numerically unstable).

Several errors from the free version are corrected in the professional version.