Shot peening optimization using the discrete element method

The aim of this study is to develop a Discrete Element Model (DEM) capable of simulating the main shot peening (SP) processes of industrial interest. By means of this model, shot - shot interaction, shot - target interaction and the overall shot flow were investigated in detail with limited computational effort. A new technique to dynamically change the coefficient of restitution (CoR) for repeated impacts of shots on the same spot was implemented to take into account the effect of material hardening. It emerges that changing the CoR for subsequent impacts has a significant influence on the predicted overall peening effect