Continuous modeling of the transient and steady cyclic hardening/softening behavior of metallic materials under amplitude change loading

摘要

This paper is concerned with the performance of the plastic strain amplitude measure, originally motivated and then abandoned by Haupt et al. [1]. Reasons for success and failure in modeling for the amplitude dependence are discussed. It is shown that if the memory parameter in the variable to indicate the center of the plastic strain region is determined suitably, the measure gives satisfactory performance in reflecting the amplitude behavior. By incorporating a hardening function dependent on the measure into the intrinsic time scale used in Valanis' endochronic plasticity, various transient and steady cyclic phenomena of hardening materials can be reproduced.