Modelling impact damage and breakage of a particle bed using SPH and DEM

Abstract eng:
This work aims to elucidate the impact breakage of a bed of particles in an environment similar to that found in comminution devices. Smoothed Particle Hydrodynamics (SPH) and the Discrete Element Method (DEM) are used to simulate the impact of rigid steel spheres on the particle bed. With SPH, continuum damage mechanics is used to simulate the extent of damage and (brittle) failure in the bed. For DEM, a MohrCoulomb law is applied to represent cohesive inter-particle forces and calculate the relevant failure criteria. The numerical simulations are conducted concurrently with laboratory experiments in which the stress and energy absorbed during the impact event is measured by a load cell. The rock progeny are also measured to assess the level of breakage. The SPH and DEM simulations are calibrated against experiment and subsequently demonstrated to be a valuable means of studying the stress distributions which initiate crack propagation and failure.

• Export as: BibTeX | MARC | MARCXML | DC | EndNote | NLM | RefWorks
• Add to your basket