TOCHNOG
Category Numerical analysis (general)
Publisher  FEAT 
Platform Win95/98, WinNT, UNIX, HP, Linux, SGI, Sparc
Status Commercial
Description TOCHNOG is a general finite element analysis program for static, quasi-static and dynamic analyses. Input: Format free input. Boundary conditions at geometrical entities. Output: Output at geometrical points. History of variables. Interface files for postprocessing. Finite elements supported: 1D, 2D and 3D. Only isoparametric elements, no beams and shells. Linear simplex elements (2 node bar, 3 node triangle, 4 node tetrahedron). A full family of first to fourth order bar, quadrilateral and brick elements. Mesh generation: Macro regions are automatically divided into finite elements. Local h-refinement (e.g. using residues in equations). Global h-refinement. Global p-refinement (polynomial refinement). Remeshing (using residues in equations or element shapes). Building a totally new mesh. Mapping from old state variables. Equations and materials supported: Convection-diffusion equation - Temperature calculations. Fluids - Stokes and Navier-Stokes. Solids - Elasticity (isotropy and transverse isotropy). - Plasticity (Von-Mises, Mohr-Coulomb, Gurson, etc.; plasticity surfaces can be arbitrarily combined). - Damage. - Thermal stresses. - Hypoelasticity. - Viscoelasticity. - Viscoplasticity. - Viscosity. Ground water flow equation - Storage equation. Wave equation. Residues in equations can be printed/plotted. Error estimates for all data (stresses, forces, temperatures, etc.). Nonlocal calculations for softening materials - Strain averaging within a radius for all material models. Interaction analysis - Automatic fluid-solid interaction. Temperature effects on fluids, solids. Contact analysis - Contact with and without friction. Frictional heat generation. Frames of description - Lagrangian, Eulerian, and AEL (arbitrary Eulerian Lagrangian) calculations. The following functionality is parallized: - element nodal force calculation. - contact algorithm. - mapping of state variables when building a new mesh. - determination of boundary conditions. - nonlocal strain calculation. Features: Automatic distribution of tendons over linear finite elements (automatic embedment). Inverse modeling. Restart possibility. Convection wiggle stabilization (both for low and high order elements). It is available as both a supported commercial product and as unsupported freeware.
Cost Supported Euros 5050. Academic Euros 2595. Also unsupported freeware on WWW.
Data formats supported None stated
Supplier in Netherlands  FEAT 
Supplier in United States of America  Sourceforge.net 

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