Mechanical behaviour of DEM crushable grains with fines removal

Abstract

In order to understand the fundamental behaviour of crushable materials with fines removal in wide stress range, a numerical investigation was conducted. The investigation was carried out using DEM crushable materials because of representation of crushing phenomena. Firstly the volume percentage and microscopic stress of smallest grains regarded as fines were discussed during K0 compression. Then the mechanical behaviour were examined on the void ratio variation and the evolution of particle size of the material during K0 and plane strain compressions after fines removal. The effects of removal was dependent on the stress level. For higher stress level, a reproduction of smaller grains and the corresponding grading change were found out during K0 compression and PSC after the removal. Then the materials indicated same compression and critical state conditions to original material.