Modelling of Plastic Anisotropy and Plastic Volume Change

Abstract

An anisotropic material law for metallic materials is presented which is able to describe plastic volume changes in the elastic-plastic transition area. The modelling includes a mixed isotropic-kinematic hardening rule. The strategy of evolution is used to fit the material law to yield loci of X5CrNi18.10. The additional extension of the model by anisotropic hardening permits the description of the deformation anisotropy. Finally, the plane compression of a thick cylinder is used to show the effect of the material law used. Therefore the outer radius is equally reduced and the deformation behaviour of the inner radius is observed.