【摘要】 通过对位错在晶格内运动的动力学过程的全面分析，本文提出了一种考虑到粘性阻尼效应和热激活的位错集体运动统一理论，其特点是可用一简单的方程对从低速到高速运动的大量位错的平均行为进行统一描述。对ＫＣｌ晶体的典型实验数据的拟合发现理论描述与实验结果相当一致。本理论将可为构造描述材料宏观力学行为的本构模型提供正确的基本出发点。更多还原

【Abstract】 By the analysis of the dynamic processes of the movement of dislocations through a crystal lattice, a unified theory of collection dislocation motion including both thermal activation and viscous drag effects is proposed. The theory is able to describe the average behaviour of dislocations which move at low and high velocities with a simple equation.The experimental dislocation velocity─stress relation data of KCl crystals are fitted with the theory. Good consistency is obtained. The theory can be used as the start point in establishing the constitutive laws of macroscopic plastic deformation of crystalline materials更多还原