NUMERICAL SIMULATION FOR A DIRECT BOX SHEAR TEST ON GRANULAR MATERIAL AND MICROSCOPIC CONSIDERATION
粒状体直剪试验的数值模拟与微观考察

A direct box shear test on granular material is successfully simulated by means of distinct element method. Based on the simulation results, a method is proposed to consider the effect of frictional resistances between the upper shear box and the sample on the measured shear strength when the sample is dilated during shearing. The overall strains in the sample are evaluated. The macro stress strain relations on the shear plane are related to the micro structural quantities of particles comprising the sample.