关于大变形条件下晶体弹—塑性本构关系的研究

The Constitutive Relationship of Crystals with Large Elastic-Plastic Deformation

考虑面心立方晶体滑移特性,晶格的转动,认为晶体的塑性变形是由滑移产生,且晶体内的弹性变形不受滑移的影响,并建立了计算模型。采用微观力学的方法,用矩阵形式推导了Jaumenn应力率的增量型的晶体弹—塑性的本构方程。

In this paper the micromechanical model of slip deformation process of crystals is proposed according to the slip characteristics of crystals. The constitutive relationship with the consideration of Jaumann rate of Kirchhoff stress for elastic-plastic crystals in incremental form is developed. The effect of rotation of crystal axes besides usual element rotation is taken into account.