Chinese Journal of Theoretical and Applied Mechani ›› 1999, Vol. 31 ›› Issue (4): 484-492.DOI: 10.6052/0459-1879-1999-4-1995-057

• Research paper • Previous Articles     Next Articles

A CONSTITUTIVE MODEL FOR NONPROPORTIONAL CYCLIC PLASTICITY WITH LOADINGPATH DEPENDENCE

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  1. 上海交通大学工程力学系,200240
  • Received:1900-01-01 Revised:1900-01-01 Online:1999-07-25 Published:1999-07-25

Abstract: In order to describe the hardening behavior of metallic materials under nonpropertional cyclic loading, a number of nonproportionality parameters have been proposed[10]. For some loading paths, the degree of nonpropertional cyclic hardening can be animated by these parameters. But for the paths containing not only the stress relaxation but also the many times unloading per cycle, they do not work well. For instance, these parameters always predicted a higher stress level for the stair-step loading and a low...

Key words: nonproportional cyclic loading, delay response, loading-path dependence, endochronic constitutive equations