固态高聚物的屈服和塑性变形行为

固态高聚物屈服和塑性变形的固体力学研究主要包括两个方面:①研究这类材料产生屈服和塑性变形的条件及其具体的行为特征;②从整体上分析其应力应变行为,力求建立起相应的本构关系方程。本文将对这一领域的研究发展状况作一述评,并简要介绍我们最近取得的一些成果。内容包括屈服变形的现象与特征,屈服准则,取向材料的变形行为,热激活塑性变形理论,材料的本构方程,以及我们提出的粘弹塑性理论模型与本构方程。 

YIELDING AND PLASTIC DEFORMATION OF SOLID POLYMERS

Over recent years a tremendous interest has been shown in the yielding and plastic deformation of polymers. The studies of this area in the last two decades or so are reviewed. The main discussions are focused on three parts: the first is the yielding criteria of isotropic and anisotropic polymers, the second is concerned with the theories of thermally activated yielding and plastic deformation, and the third is an outline of stress-strain behaviour and related constitutive relations. While reviewing variou...