基于形变晶粒增殖过程的弹塑性本构模型<sup>*</sup>

基于形变晶粒增殖过程的弹塑性本构模型^*

基金项目: *国家自然科学基金

Department of Engineer Mechanics, Qinghua University, Beijing 100084, P. R. China

摘要: 本文根据多晶金属变形的细观过程特征,将形变晶粒分为三类.提出塑性形变晶粒增殖的概念,并由此导出较为简洁的弹塑性本构关系.能对若干实验结果给出合理的解释.表明材料的宏观屈服、率相关和加工硬化等现象与形变晶粒演化的动力学过程密切相关.
- 多晶体 /
- 弹塑性变形 /
- 木构关系 /
- 屈服 /
- 加工硬化 /
- 位错
Abstract: According to the characteristics of micro-deformation of polycrystalline metal,the author divides grains intothree kinds and proposes a new conceplion of deformed grains.multiplication,from which some explicit elastic-Plastic constitutive equations can be deduced and some experimental results can be explained quantitativelv,It shows that the macro-yield,rate-correlativity work hardening and other phenomena are all closely related to the kinetic process of grains deformation.
- polycrystal /
- elastic-plastic deformation /
- constitutive relation /
- yield /
- work hardening /
- dislocation

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