期刊
INTERNATIONAL JOURNAL OF PLASTICITY
卷 119, 期 -, 页码 331-343出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.ijplas.2019.04.006
关键词
Plasticity model; Non-normality; Kinematic hardening; Strain-path change
资金
- China Scholarship Council
The two-stage abrupt strain path change method is used to investigate the subsequent yield surface evolution, as predicted by associated J(2) plasticity models. Experimental results from the literature have revealed several specificities of the yield surface evolution following such a strain path change, including formation of a vertex and apparent non-normality. The current study showed that some features of this behavior can be simulated using models based on associated plasticity. Kinematic hardening had the most important effect, together with rate sensitivity and elasticity. The results suggest that some apparent violation of the normality condition can result from the combined effects of kinematic hardening, rate sensitivity and elasticity, even when the normality rule is built into the model.
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