A Simple Inelastic Constitutive Model for Evaluation of Stable Cyclic Stress Response under Nonproportional Straining

This paper proposes a simple two-surfacce model for cyclic incremental plasticity based on combined Mroz and Ziegler kinematic hardering hardening rules under nonproportional loading. The model has only seven material constants and a nonproportional factor which describes the degree of additional hardening. Cyclic loading experiments with fourteen strain paths were conducted using Type 304 stainless steel. The simulation has showen that the model was precise enought to calculate the stable cyclic stress-strain relationship under nonproportional loadings