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Last version update: 22-10-2018

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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

Introduced

Introduced start and end time for calculations in

Ignore empty elements for

Introduced extra output for

Corrected adonis scripts for writing

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

Introduced

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

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

Corrected

Made

Introduced printing of the coordinates themselves with

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Corrected

Introduced some extra warnings on possible input errors.

Corrected some syntax for input files in the

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Introduced 2014 masin clay hypoplasticity with input data

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)

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Changed

Introduced new mathematical routines for user supplied laws in

Changed

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

Introduced Tochnog Professional - Racing Team in youtube channel.

Corrected bug in

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

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Corrected bug preventing calculation of

Corrected bug in

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

Faster

Corrected

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

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Small manual corrections.

Corrected

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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.

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More clear explanation

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

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Introduced

Corrected calculation

Changed naming

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

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

Corrected reading *cload in

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

Introduced running Tochnog from within Freecad (see

Validated

Introduced

Corrected printing

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

Corrected linking with user supplied

Introduced

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

Changed prescribed velocities and rotations to vectors for

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Introduced temperature calculations in

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Corrected naming in vtk files from

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Simplified

Validated

Validated

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Corrected bugs for

Changed

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

Introduced in homepage examples section: masonry facade analysis (3D masonry facade, multiple window and door openings, compare with literature, inputfile

Introduced in homepage examples section: masonry material test under compression (3D masonry panel, compare with literature, inputfile

Introduced in homepage examples section: masonry material test under compression and shear (3D masonry panel, compare with literature, inputfile

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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 in homepage examples section: masonry 3D Wall (3D masonry wall damage, compare with experiments, inputfile

Introduced in homepage examples section: heat exchanger pile calculations heat_exchanger_pile_temperature and heat_exchanger_pile_load_temperature.

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Corrected bug for

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Corrected bug in generation student license information.

Improved tolerances in

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

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Introduced 64 bit trial versions, see the download page.

Introduced new download page

Introduced extra error checking data items.

Corrected

Corrected

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Changed

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Introduced gid manual in manuals section homepage.

Improved

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Changed default for

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Improved

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

Changed default

Corrected

Corrected

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

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Changed

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Introduced speed improvement for large heavy parallel computations.

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Removed

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Introduced viscoplasticity in

Corrected bug in

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Changed

Introduced Youtube video tutorials in Examples section.

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Use initial node coordinates in

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

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Introduced frequency 0 for

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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

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Corrected usage

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Corrected usage

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Deleted not needed data prints from

Changed

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Solved problem with student license mechanism for computer locked licenses.

Corrected bug in

Improved stability plasticity iterations for heavily non-associated laws.

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

Introduced for user supplied routines the file

Introduced for

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Introduced suppressing all hydraulic heads etc. for

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

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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

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.

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Corrected bug in

Introduced geolink/bridge example in the examples section.

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Corrected bug reading plate thickness for

Corrected bug when combining

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Improved speed linear calculations.

Improved pardiso solver parallelisation.

Improved speed heavy parallel computations.

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Introduced all area integrals like

Corrected bug in

Corrected bug in

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

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Introduced tension cutoff limit in

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Corrected bug printing interface elements in

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

Gmsh and Mecway manuals on internet on the manuals page.

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

Improved error messaging for

Improved linux executable speed.

Improved ms windows executable speed.

Introduced 32 bit arm excutables (selected customers only).

Parallel implementation

Parallel implementation

Corrected bug in

Improved parallelisation speed up..

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Introduced plotting of geometries in gid plots.

Better naming convention in gid plots for

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More clear manual for

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Corrected excessive memory usage

Introduced tensors from

Improved

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Installed latest pardiso solver for

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

Introduced as extra post-processing for

Introduced

Changed definition of tochnog materials in gid.

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

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Allow more long strings in

Increased maximum length of most data items.

Upgraded user supplied distribution to Linux Mint 17.1 rebecca.

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Improved

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Extended

Corrected bug in

Changed default for

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Improved

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Improved error checking for

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Corrected bug in

Improved

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Corrected bug in

Corrected bug in

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Allowed

Lower memory usage for

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Installed latest pardiso solver for

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Introduced copying

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Changed

Introduced calculation landslide impact force on concrete safety walls.

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Introduced indices for

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Introduced density variations in landslide materials.

Improved efficiency

Changed integration scheme

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

Improved tecplot file from

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Introduced

Corrected bug in

Changes in license system for slow computers.

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Introduced in gid generation of

Introduced generation of

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Corrected bug in

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Introduced more clear messages on input errors.

Changed

Changed

Corrected bug in

Changed

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Corrected bug in

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Introduced latest pardiso solver .

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Extended

Full static c++ code check.

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Corrected bugs in

Corrected bug in

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Changed

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

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Changed

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Introduced in

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Corrected bug in post-processing record

Improved

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Introduced axisymmetric spring elements.

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

Introduced plotting node boundary indicator in gmsh and vtk.

Introduced

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

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Introduced

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Introduced incremental driver in order form.. Example pictures in

Faster license check (speed up calculations).

More clear error messages.

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

Corrected maximum element matrix length for

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Updated gid - tochnog preprocessor interface. Updated gid manual.

Corrected in

Slightly improved convergence consolidated groundwater calculations.

Changed default of

Changed default

Corrected bug in scanning ranges in include files.

Corrected bug in

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

Introduced defined words in ranges

New options incremental driver.

New definition

Corrected

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

Corrected hypoplastic void ratio for large deformations.

Corrected

Changed

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Do not plot inactive elements from

Corrected

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Introduced interface directions in gid plots.

Introduced pardiso openmp reordering.

Changed

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

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Improved

Changed definition of

Changed

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Corrected bug in

Improved

Upgraded

Changed format

Corrected printing of OCR i.c.w.

Upgraded to latest intel compilers.

Higher level of compiler optimisations (for faster executables).

Improved license mechanism.

Improved executable protection with crypt techniques (

Small manual improvements.

Student licenses available on demand.

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Changed

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Deleted

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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

Cleaned compiling and linking of user supplied routines

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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.

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Changed

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

Clearified compilation of user supplied

Corrected bug in

Better error checking.

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Improved

Improved

Automatic conversion of windows format

Better

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Deleted

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.

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Introduced end time in

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Improved

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Introduced plotting of mpc indicator in gid.

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

Improved input checking.

Corrected

Corrected

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Introduced better input error checking.

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Changed

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Made

Corrected user supplied routines

Corrected printing

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Changed

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Improved

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Introduced in

Changed

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

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Introduced ranges in

Changed

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Skipped

Skipped

Changed

Changed

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.

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Changed

Introduced possibility to read

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Introduced use of a

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Changed

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Changed use of

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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).

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Changed

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Introduced extra error checking input file.

Improved input error checking.

Changed format

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Improved

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Changed

Improved stability plastic iterations for all

Improved

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

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Changed syntax

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Improved

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

Lower memory usage

Improved parallelisation BICG solver

Changed syntax

Introduced 3D interfaces in GID

Changed

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Changed defaults for

Changed syntax

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Changed

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

Introduced tutorial manual and validation manual.

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Changed

Deleted

Changed parallel computations (better parallelisation).

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Changed

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Introduced in GID plot of

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

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Introduced plotting of interface strains and stresses in GID.

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Changed automatic default of

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Default input file

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Changed default

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Introduced 64 bit tochnog for Intel Itanium under Linux.

Introduced plotting boundary conditions and external forces in GID (plot

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Deleted

Introduced external forces in

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Changed

Deleted

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Changed

Introduced 64 bit tochnog for AMD Opteron under Linux.

Lower memory usage.

Introduced dongle locked linux distributions.

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Introduced hinge elements with group_type

Introduced interface elements by setting

Changed many data item names.

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Deleted

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Changed

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Introduced manuals in pdf format.

Introduced, by example,

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

Corrected

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Introduced, by example,

Good accuracy also for very low groundflow permeabilities..

Introduced UMFPACK direct LU solver (

Faster for elasto-plastic calculations.

Introduced gid plotting in 1D problems.

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Introduced quadratic axisymmetrical elements.

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

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Introduced parallelisation on OpenMP systems (shared memory).

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Changed

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Changed labels maxwell stresses to

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Changed definition

Introduced easier printing of

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

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

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Changed formulation of

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Introduced minimal timestep size in

Changed several

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Changed definition normal in

Changed default to

Changed several

Skipped

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