颗粒物质内部应力分布的研究

Studies Progress on the Distribution of Stress in Granular Material

作者介绍了颗粒物质内部应力分布的研究现状,讨论了典型的沙堆底部中心压力最小这一反常规现象及相关理论以及动态二维沙堆实验与理论分析,对这些理论进行了综述和比较。测量了探棒与颗粒相对运动情况下,颗粒重组导致滑动摩擦力增大的实验,并对结果进行了解释。

This paper introduces the present situation of studies on the distribution of stress in granular material. These theories are summarized and compared: the typical unusual phenomenon of the minimum stress below the apex of the sand pile and correlative theories; the experiments and theoretic analysis ~about the planar dynamic sand pile. On condition that there are relative movement between the rod and granular material, we make an experiment on break-away friction increasing with the reformation of ~granular material and explain the result.