MF GenYld + CrachFEM
Overview
More information on the material model (PDF, 3 pages)
MF GenYld + CrachFEM is a comprehensive material and failure model that can be used in combination with commercial explicit finite element codes. It allows the characterisation of various metallic and polymer materials across the coupled FE codes and across shell and solid element models.
This approach of a universal material model lends itself to the use of standardised experimental and theoretical methods for the characterisation of the material for FE analysis.
Plasticity model
The module MF GenYld (generalised yield locus) describes the plastic behaviour of the material. It includes a variety of yield criteria and hardening models as well as advanced models for isotropic-kinematic and anisotropic hardening. This allows the user to model various structural materials, such as steels, light metal alloys and plain and short-fibre reincorced polymers.
Comprehensive failure model
The module CrachFEM describes material failure. Ductile normal fracture and shear fracture may be described for two- and three-dimensional elements. In addition, local tensile instability may be described for shell elements. This failure mechanism represents the local necking of sheets which cannot be represented with the regular shell discretisation.
Failure may be used in post-processing; the failure risk can be shown in a fringe plot, e.g. to indicate problematic zones during forming. It is also possible to represent failure transiently by eliminating elements according to their failure risk. This may be used to account for the different distribution of forces in a vehicle crash after a part has ruptured.
Visualisation
Together with MF GenYld + CrachFEM, the material browser MF View is distributed. It allows you to quickly scan the input data, find formatting errors and change numbering, unit system or solver format.
The simulation results are visualised with the standard post-processing program for the underlying solver.
Availability
The material and failure model MF GenYld + CrachFEM may be coupled to the explicit FE codes LS-Dyna, Radioss und ABAQUS/ Explicit via the user material interface. Massivly parallel versions (MPP) are supported.
Further, the failure model CrachFEM is available in PAM-Stamp and as material type 128 of PAM-Crash.
ABAQUS, ANSYS, LS-DYNA, PAM-Stamp, PAM-Crash and RADIOSS are registered trademarks.