In this paper, an improved three-dimensional (3D) numerical model for erosion processwas developed inwhich
multiple solid particles were adopted for characterizing the accumulation of damage. In this model, the metalceramic
composite materials were coated on nickel-base superalloy. The explicit solver LS-DYNA has been
used to simulate the erosion process. The effects of the coating thickness, particle size and impingement velocity
on the stress distribution and damage of the target material were studied. The simulation results show that the
reasonable coating thickness can effectively prevent its peeling. With the increase of impact velocity, radial and
lateral cracks are initiating and propagating on the coating surface. Particle size has the significant influence on
the coating loss. This multiple particle model can help understanding and predicting the erosion results better
than conventional FE simulations.