Abstract
To study effects of grain shape on mechanical behavior and shear band of glanular materials, a number of biaxial compression test were simulated with the DEM analysys, in which the specimens made by different types of grain shape were used. Each grain is composed of three particles which are overlapped each other. From these simulation results, it was found that the shear strengths obtained showed linear relation to the shape index “FU”, which characterizes grain shape. Besides, the rotations of grians contributed to the formation of shear band. A couple of shear bands appeared periodically, and the grain shape had effects on the quantities of grain rotation.
