Last version update: 19-11-2017

Changes:

Corrected bug in calculations with large number of hex27 elements (memory 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.

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Introduced gid manual in manuals section homepage.

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Changed default for

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

Changed default

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

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Introduced speed improvement for large heavy parallel computations.

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Introduced viscoplasticity in

Corrected bug in

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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

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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

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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

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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

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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 error checking for

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Corrected bug in

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Lower memory usage for

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Installed latest pardiso solver for

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Introduced copying

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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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Corrected bug in

Changes in license system for slow computers.

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Introduced in gid generation of

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Corrected bug in

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Introduced more clear messages on input errors.

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Corrected bug in

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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

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

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Corrected bug in post-processing record

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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.

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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 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

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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

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

Corrected hypoplastic void ratio for large deformations.

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Do not plot inactive elements from

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Introduced interface directions in gid plots.

Introduced pardiso openmp reordering.

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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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Changed definition of

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Corrected bug in

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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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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 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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Automatic conversion of windows format

Better

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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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Introduced plotting of mpc indicator in gid.

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

Improved input checking.

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Introduced better input error checking.

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Corrected user supplied routines

Corrected printing

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

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Introduced ranges in

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Skipped

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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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Introduced possibility to read

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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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Introduced extra error checking input file.

Improved input error checking.

Changed format

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Improved stability plastic iterations for all

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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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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

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Changed defaults for

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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 parallel computations (better parallelisation).

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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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Introduced external forces in

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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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Introduced manuals in pdf format.

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

Corrected

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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 labels maxwell stresses to

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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

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Skipped

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