ABSTRACT:Modeling and studying the impact behaviors of angular particles are critical in understanding the mechanisms of erosive wear on solid surfaces. This paper focuses on effective meshfree model based on the Smoothed Particle Hydrodynamics (SPH) method to simulate impacts of angular particles on metallic surfaces. The predicted results are compared with the available experimental data, and good agreements have been achieved. Our simulations under different incident conditions successfully reproduce the general impact behaviors of angular particles, including rotating behavior and rebound behavior, which enables detailed examinations of erosion mechanisms. We find that the rotating behaviors are mainly determined by initial orientation and impact angle, while impact velocity has little effect. For backward impact involving a prying-off action, there generally exsits a critical impact velocity below which the cutting process would never be finished, which may result in a rebound angle greater than 90°. Downloaded by [RMIT University Library] at 20:31 29 June 2016 ACCEPTED MANUSCRIPT ACCEPTED MANUSCRIPT 2 Further, multiple and overlapping impacts are simulated to reveal the effect of pre-created crater on the subsequent impact. The results demonstrate the ability of present model on handling extremely deformed surface by overlapping impacts. The proposed SPH model and out present study could be useful in the study of erosive wear on the surface of metal devices that carries granular substances.