News

PMD version 14 (2024)

Membrane stress

The program STR3 has been extended to calculate membrane stresses on shell (semi-loof) elements.

Directional hardening material model

The nonlinear static solver (program HPLS) has been extended to support the Dafalias-Feigenbaum model with directional distortional hardening.

The implementation of this model was carried out within the project TN01000024/08 Library of codes for plasticity and creep models implementation.
Creep material models

The nonlinear static solver (program HPLS) has been extended to support additional material models for creep calculations: Bina, Kloc and Norton-Bailey.

The implementation of these models was carried out within the project TN01000024/08 Library of codes for plasticity and creep models implementation.

Creep material models

The nonlinear static solver (program HPLS) has been extended to support additional material models for creep calculations: Norton, Time Hardening and MPC Project Omega.
One-point integration – Dynamics

The nonlinear dynamic solver (program HDYN) has been extended to support the one-point Gauss integration rule which can significantly speed up the calculations of complex problems.
Fast direct solver – Dynamics

The sparse direct method can now be used in calculations of dynamic responses using the modal superposition method (programs FEFS + HMOD).
Fast direct solver – Heat Conduction

The sparse direct method can now be used in calculations of heat conduction (programs XT2S, XT2T, XT3S and XT3T).

Pyramid element

A new isoparametric 3D square pyramid element has been added to the element library. This element can only be used for elastostatic problems for now.
A parallel fast direct solver

The fast direct solver has been extended and optimized for modern multicore and multiprocessor computers. The parallel version of the solver achieves an order of magnitude higher speed calculation (depending on the number of cores and processors) compared to the previous sequential version.
Fast direct solver – Dynamics and Plasticity

The sparse direct method can now be used in calculations of eigenfrequencies and eigenmodes (programs FEFS + HEIG), and plasticity problems (programs FEFS + HPLS).

Diagonalization of mass element matrices

The program HMOT has been extended with the option to calculate diagonalized (lumped) element mass matrices by the HRZ (Hinton-Rock-Zienkiewicz) method.
Fast direct solver – Elastostatics

The linear elastostatic solver (program FEFS) has been extended to support the sparse direct solution method combined with the minimum degree ordering algorithm. This direct method is memory-demanding but many times faster than the previously used frontal method, especially on large finite element meshes.