Elastoplastic finite element analyses of metal deformations using polycrystal constitutive models

摘要

A finite element formulation using an elastoplastic polycrystal constitutive theory is presented. The crystal constitutive equations are expressed in an intermediate configuration obtained by unloading the deformed crystal without rotation from the current configuration to a stress-free state through small elastic strains. These constitutive relations and an associated integration procedure are implemented in a pressure-velocity (mixed) finite element formulation.