The discrete element method (DEM) is widely used as a simulation tool that can quantitatively reproduce the behavior of powder in several industrial processes. To reproduce a grinding process such as the high pressure grinding roll (HPGR) with DEM, it is necessary to combine it with a particle breakage model that directly calculate particles breakdown. In this paper, an example of HPGR simulation by DEM coupled with T10 model, which is one of the particle breakage models, was introduced. DEM simulations suggested that crack growth and liberation in HPGR might be related to the impulse, which is the product of the stress and time received by the particles.
