抄録
The shear mechanism of granular materials has been studied from a microscopic point of view in order to derive their macroscopic stress-strain relationship. For this purpose, simple shear tests were carried out using a pile of aluminium rods to simulate granular materials in a two-dimensional state. In the analysis, granular materials are considered to be an assembly of a unit element composed of two particles, which is named "two particles model". According to this model, the sliding displacements between two particles across the potential sliding plane were formulated by considering the mechanism of disappearance and generation of angles of interparticle contacts. A new stress-strain equation was derived from the relationship of these sliding dispacements, and compared with the results of cyclic simple shear tests on aluminium rod mass. Furthermore, stress-strain characteristics of a sand under cyclic loading were explained by the proposed equation.
