基于物理变量的热粘塑性本构模型  

A THERMO-VISCO-PLASTIC CONSTITUTIVE MODEL BASED ON PHYSICAL VARIABLES

作　　者：程经毅[1] 周光泉[1] 

机构地区：[1]中国科学技术大学

出　　处：《爆炸与冲击》1996年第3期218-231,共14页Explosion and Shock Waves

摘　　要：在位错的运动和产生与塑性变形的一般关系及考虑到热激活与粘性阻尼效应的位错集体运动的统一理论基础上，通过对结构参量的演化规律的具体建议，提出了一种基于物理变量的热粘塑性本构模型。在此模型的基础上。By combining the general equation relating the plastic strain rate to the dislocation motion,generation and the unified theory of collective dislocation motion including both thermal activation and viscous drag effects which were proposed previously by the authors,and through the proposing of appropriate evolution laws of dislocation structure parameters,a kind of thermal viscoplastic constitutive model based on physical variables is obtained.Based on this model,the mechanisms of dynamical mechanical behaviour of metals are discussed.

关 键 词：位错动力学 本构模型 粘塑性 热粘塑 

分 类 号：O345[理学—固体力学]