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Sun Aug 19 13:25:52 EDT 2001
Corrected error in visco-plasticity, thanks to Minoru Tanaka.

Wed Jan 31 14:02:17 GMT 2001
Changed control_mesh_merge_macro into control_mesh_merge_macro_generate.

Wed Jan 24 09:43:03 GMT 2001
Introduced bounda_unknown, bounda_time and group_type in tochnog gid environment.

Tue Jan 16 20:04:52 GMT 2001
Introduced start_if ... end_if blocks.

Mon Jan 1 08:54:51 GMT 2001
Better version crack.cc, thanks to osman@fuse.net.
Corrected generation multiple element types in gid prepocessing for tochnog.

Mon Dec 25 10:45:07 GMT 2000
Introduced special restart database in control_print_database.

Wed Dec 20 18:31:11 GMT 2000
Changed seperate into separate.
Changed devide into divide.

Tue Dec 12 14:42:35 GMT 2000
Corrected error in control_mesh_merge, thanks to Gil Lecker.

Sat Dec 2 14:21:31 GMT 2000
Solved convergence problem with trusses.

Wed Nov 29 10:01:24 GMT 2000
The Matsuoka-Nakai plasticity model is available now.

Sun Nov 26 19:17:55 GMT 2000
Changed control_solver into control_options_solver etc.

Sat Nov 18 12:31:19 EST 2000
Deleted old tochnog environment in gid preprocessor. Introduced tochnog.gid.

Thu Nov 16 14:25:08 GMT 2000
Introduced dfgrad's and drot in call to umat. Credits to Henning Schuette, Bochum University.

Wed Nov 8 13:39:12 GMT 2000
Changed naming convention in groundflow; introduced group_groundflow_capacity.
Speed increased about 20%.
Some robustness improvements.
Download recommended.

Sat Nov 4 09:45:25 GMT 2000
Introduced control_mesh_delete_geometry_factor (idea by Ivo Herle, Czech Academy of Sciences).

Tue Oct 24 11:11:06 GMT 2000
Corrected rotational boundary conditions. Credits to Carsten Neuberg (Institut fuer Geotechnik, TU Dresden).
Corrected labels hypoplasticity intergranular strains. Credits to Marcin Cudny (formerly Katedra Geotechniki, University Gdanks).

Tue Oct 10 11:59:11 GMT 2000
Introduced force_element_edge_sine etc. (idea by Gerd Festag, Geotechnik TU-Darmstad)

Sun Sep 17 07:11:56 GMT 2000
Changed print_filter (select nodes and elements on macro's).
Changed control_print_filter (select more than 1 print_filter).
Changed -updated_without_rotation formulations trusses (and trussbeams).
Introduced control_print_unknownsrhside (print external forces, heat-fluxes, etc.).
Introduced control_print_element (print element data versus coordinate; convenient for beam moment lines).
Corrected error in force_element_edge_factor for 3D.

Mon Sep 11 11:39:28 GMT 2000
Set integration method to -gauss for axisymmetry. Download for axisymmetry users recommended.

Sat Sep 9 12:10:22 GMT 2000
Introduced control_mesh_generate_contactspring_element.
Introduced control_mesh_generate_truss_beam_loose.
Introduced control_mesh_generate_truss_beam_macro.
Introduced control_mesh_merge_macro.
Download recommended: Many other small changes.

Fri Sep 1 11:59:11 GMT 2000
Introduced group_materi_plasti_boundary (easy modelling frictional slip granular materials on steel, concrete, etc.)
Corrected error in group_contactspring_friction_automatic.

Tue Aug 29 11:33:44 GMT 2000
Memory usage reduced.

Mon Aug 28 09:38:59 GMT 2000
Introduced control_mesh_split_only.
Changed groundflow_phreaticlevel in 3d.

Sun Aug 27 14:41:11 GMT 2000
Introduced change_dataitem_time_discrete.

Thu Aug 24 13:33:31 GMT 2000
Introduced force_element_edge_water_time.
Introduced options_skip_plasticity.
Introduced print_control.
Changed control_delete_geometry_element.
Changed control_delete_geometry_elementgroup.
Changed force_element_edge_water.

Wed Aug 23 08:48:19 GMT 2000
Introduced control_timestep_multiplier (e.g. convenient for consolidation analysis).
Introduced control_mesh_merge_not (e.g. keep sheet piles seperated from soil).
Introduced group_contactspring_friction_automatic (take friction coefficient from neighbour elements).
Changed input records for contact springs.
Problem with runtime error for visual c++ users solved. Attention: download visual c++ users recommended.

Tue Aug 22 17:22:33 UTC 2000
Introduced print_arithmetic.
Introduced print_define.

Mon Aug 21 13:26:20 UTC 2000
Introduced atutomatic counting of geometries and so, see the counter_a and counter_b in the data part.

Sun Aug 20 12:41:18 UTC 2000
Introduced group_beam_plane (beam in 3D) (see tests trubea2.dat etc.)
Introduced group_beam_memory (small and large deformation option for beams)
Introduced group_truss_memory (small and large deformation option for trusses)
Introduced force_element_edge_water (for water pressure on piles and so; see force5.dat).

Sat Jul 29 09:30:58 UTC 2000
Introduced options_solver.
Introduced -global_energy in post_global.

Sun Jul 23 16:22:54 UTC 2000
Introduced area_element_group_sequence_*.
Introduced control_print_filter.
Introduced print_lastdatabase.
Introduced group_materi_density_groundflow.
Introduced control_unknown_reset_value.
Introduced -contactspring elements (group_contactspring_cohesion,
group_contactspring_direction, group_contactspring_parameters,
element_contactspring_force, control_mesh_generate_contactspring).
Corrected -matrix_superlu solver for large calculations.
Always do control_print_gid with -seperate even if the time didn't increase.
Introduced 'effective stiffness' history variable in hypoplasticity.
Introduced -O3 compilation for linux (was lost in last version).
Corrected problem with visual c++ compiler for some input.
Groundflow velocities above phreatic level zero.

Tue Jul 25 07:50:55 UTC 2000
Introduced materi_strainenergy in the initialisation part.

Fri Jul 14 11:54:46 UTC 2000
Introduced post_node_rhside_ratio_unknowntypes

Wed Jul 12 18:24:33 UTC 2000
Changed definition groundflow_phreaticlevel_bounda

Tue Jul 11 17:55:44 UTC 2000
Corrected error in control_mesh_generate_beam, control_mesh_generate_truss, etc. (when connecting to quadratic elements).
Changed control_mesh_macro; generated nodes and elements start from number 1.

Sat Jun 24 15:49:24 UTC 2000
Introduced -moment in post_node.

Fri Jun 16 15:41:23 UTC 2000
Corrected error in group_materi_plasti_cap. Thanks to Torsten Kraft, tkr@iwm.fhg.de

Tue Jun 13 11:45:44 UTC 2000
Introduced bounda_rotate.

Mon Jun 12 08:47:46 UTC 2000
Changed element_beam_force into element_beam_moment.

Thu May 25 15:26:34 UTC 2000
Better convergence behaviour Mohr-coulomb calculations, download recommended.

Mon May 22 13:28:21 UTC 2000
Attention: changed home directory from tn into tochnog.

Mon May 22 12:53:51 UTC 2000
Introduced control_print_dx. This generates result files for IBM open data explorer.

Sat May 13 19:12:37 UTC 2000
Changed definition of -brick in control_mesh_macro.

Sat May 13 19:08:12 UTC 2000
Introduced the one-nodes spring element -spring1

Fri Apr 14 06:37:56 UTC 2000
Introduced group_materi_plasti_hlc, by fulop@kugli.met.uni-miskolc.hu.
Introduced several scripts which translate between Tochnog and others (FE programs, pre-post), osman@fuse.net.

Mon Mar 13 09:19:05 UTC 2000
Introduced group_materi_hyper_blatz_ko, by osman@fuse.net.

Sat Mar 11 09:40:42 UTC 2000
Sequential, multithreaded and distributed SuperLU equation solver available.

Fri Mar 10 08:11:44 UTC 2000
Hyperelasticity available for membrane elements.

Sun Mar 5 09:15:01 UTC 2000
Corrected error in temperatures in contact algorithm.

Sat Feb 12 13:26:41 UTC 2000
Rubber volumetric models: group_materi_hyper_volumetric_linear, group_materi_hyper_volumetric_murnaghan, group_materi_hyper_volumetric_simotaylor, group_materi_hyper_volumetric_ogden.

Wed Feb 9 12:20:26 UTC 2000
force_element_edge_normal_factor, etc. now also in 3D

Fri Feb 4 17:00:38 UTC 2000
Printing of force in GID.

Wed Feb 2 08:24:39 UTC 2000
Paralllel solvers for distributed memory systems solver available with PETSc + MPI. See control_solver.

Wed Jan 26 08:07:53 UTC 2000
Improved memory usage. Especially for large 3D calculations.

Sun Jan 2 09:35:54 UTC 2000
Corrected error in group_time. Thanks to fengjl@iwhr.com.

Changes in 1999

Changes in 1998