ENERGY DISSIPATION CHARACTERISTICS OF CRUSHABLE GRANULES UNDER DYNAMIC EXCITATIONS

Using the discrete element method (DEM) with cluster, different degrees of particle crushing by setting various contact bond thresholds under external dynamic excitation are implemented, and their energy dissipation characteristics are also discussed. Numerical results indicate that the particle breakage ratio has a great influence on the energy dissipation ratio which is defined as consumed energy to the input energy. As the particle breakage ratio rises, which intensify the friction and the collision between particles, the energy dissipation ratio increases. Besides, most cluster disintegration happens on the early stage of cyclic loading. Gradually, the breakage rate slows down, and the energy dissipation ratio reduces.