Comparison of several plasticity theories applied to simulation of plastic deformation of porous materials

The plasticity theories and their implementation in porous materials applications is a topic still not completely set in terms of developments to be made. The yield criteria available in the literature are usually not applicable for all kinds of materials and are mainly tested for a closed set of yield conditions not considering the post-yielding behavior. The modeling of the plastic behavior of powder metals is of great importance for improving the P/M process itself (compaction, cold and hot forging) as well as for component design. In this work, the differences in the responses for different plasticity theories considering different yield criteria and the same post-yielding behavior on the simulation of the plastic deformation of a porous metal were studied. In this aim the models are incorporated into the finite element program ABAQUS, where simulations are performed for different models and the results are compared.