Present work deals with Strain-space plasticity formulation based on Il'yushin's postulate. It has certain advantages over conventional Stress-space formulation which uses Drucker's postulate. It can accommodate work-hardening, work-softening and elastic-perfectly plastic materials with single set of constitutive equations. In this paper, constitutive equations for Prezyna model are developed in strain space. This model is further implemented in the framework of finite element. The results show quite good agreement with close form solutions.

Keywords: Strain-space plasticity, Rate dependent, Perzyna model, Finite element framework.