弹塑性固体中间断位移的刚性进化

基于位移间断条件和间断位移刚性进化的单自由度动力系统，建立了一个弹塑性固体中间断位移的刚性进化分析模型，用于探讨岩土材料位移间断破坏的力学机制。首先，应用材料的强度理论，得到了弹塑性固体的位移间断条件。当位移间断出现后，完整固体分裂为两个部分，其中可滑移体部分可视作一个刚体，位移间断的进化依赖于间断面（界面）的刚度、界面与率和状态相关的摩擦律、动力输入等组成的一个单自由度系统。最后，给出了一个简单的摩擦型固体例子阐明模型的具体应用，重点说明了静、动转化过程和凝聚力丧失的进化输入。

Rigid evolution of displacement jump on elastoplastic solids

An analysis model is proposed for evaluate rigid evolution of displacement jump in elastoplastic solid,which based on displacement jump condition and a specific single freedom degree dynamic system,i.e.condition of displacement jump is educed with strength theory of materials;after displacement jump occurs,the part of free movement is taken as a rigid body;and evolution of displacement jump depends on the stiffness of jump joint(or called interface),friction law of rate and state dependent,input loading and other parameters of the dynamic system.An example of frictional solid is given to illuminate the model how to work,in which the transformation of static to dynamic and loosing of material cohesion as input are stated especially.