Endochronic theory, non-linear kinematic hardening rule and generalized plasticity: a new interpretation based on generalized normality assumption

摘要

A simple way to define the flow rules of plasticity models is the assumptionof generalized normality associated with a suitable pseudo-potential function.This approach, however, is not usually employed to formulate endochronic theoryand non-linear kinematic (NLK) hardening rules as well as generalizedplasticity models. In this paper, generalized normality is used to give a newformulation of these classes of models. As a result, a suited pseudo-potentialis introduced for endochronic models and a non-standard description of NLKhardening and generalized plasticity models is also provided. This newformulation allows for an effective investigation of the relationships betweenthese three classes of plasticity models.