ON THE DETERMINATION OF MACROFEATURES OF GRANULAR MATERIAL SAMPLES DEPENDING ON DEM-MICROPARAMETERS UNDER SIMPLE SHEAR

Abstract

The problem of cyclic shear of granular material sample in the framework of discrete element method (DEM) was considered. The realization of the shear closed to homogeneous one allows calculating the components of the stress tensor of representative medium volume depending on given microproperties of the discrete particles and on the interaction conditions between them. It was shown that the coaxiality condition of the stress and strain tensors under the shear of macrovolume is satisfied. The dilatancy curve was plotted. An analysis of the stress state and the behavior of the dilatancy shows that an increasing of loading cycle number leads to the stabilization of deformation process in which the stationary deformation regime occurs. The correlation between the obtained numerical solutions and the data of laboratory experiments carried out earlier was found.