应力波作用下颗粒介质的动力特性研究

STUDIES ON THE DYNAMIC PROPERTIES FOR GRANULAR MEDIUM UNDER STRESS WAVE

运用微结构连续介质力学和多刚体系统动力学的理论方法，考虑了颗粒体的拓扑结构及颗粒体之间的局部非线性相互作用，通过引进恢复系数，导出了适合于大变形运动（包括平动和转动）情况下，颗粒体间的滑移和分离的宏观弹塑性本构关系。最后，还给出了几种规则排列条件下，颗粒介质的本构关系。

In this paper,taking into account the topological structure and local nonlinear dynamic interaction of interparticles and introducing coefficient of restitution,an macro-elasto-plastic relation with sliding and seperation of particles under large deformation is derived with the multiple rigid dynamics and micro-mechanics approach. At last.the constitution relations are given for the special arrangements of the particles.