The role of accumulated plasticity on yield surface evolution in pearlitic steel

In this paper, we analyze one specific assumption used in many cyclic plasticity models: The dependence of the yield surface evolution on the accumulated plasticity, i.e., the time-integrated plastic multiplier. We measure this scalar variable in carefully designed experiments and track the yield surface evolution. Our results show that this variable is insufficient to describe the isotropic or distortional hardening of the investigated steel, invalidating the commonly used assumption. The results highlight requirements for developing and verifying new isotropic and distortional hardening laws.

Automated summary

In this paper, the authors analyze the assumption of the dependence of yield surface evolution on accumulated plasticity in cyclic plasticity models. Through carefully designed experiments, they measure the scalar variable and track the yield surface evolution, finding that this variable is insufficient to describe isotropic or distortional hardening of the investigated steel, thus invalidating the commonly used assumption. The results highlight the need for developing and verifying new isotropic and distortional hardening laws.