EFFECT OF PARTICLE SHAPE ON STRENGTH AND DEFORMATION OF GRANULAR MATERIAL IN DEM ANALYSIS

Abstract

To study effect of particle shape on mechanical behavior of granular material, simulations for biaxial compression and shear tests were carried out using specimens of different particle shapes. Obtained results are analyzed based on the FU value, which gives the roundness of the particle for sphere. The compression index, the internal friction angle and the coefficient of dilatency at failure depend on the particle shapes, even if they have the same physical properties. The shear resistance coefficient at the maximum compression state, which has relation to the shear resistance coefficient at the critical state, are almost the same values for different particle shapes.