Coupled finite and discrete element shot peening simulation based on Johnson–Cook material model

Abstract

Shot peening is an essential treatment that produces a beneficial compressive layer on the material’s surface, which significantly improves its fatigue life. To minimizes the cost and resources used in determining the finest shot peening parameters based on the experimental approach, a numerical model capable of computing the induced compressive residual stress accurately is required. Hence, the numerical simulation of the shot peening process with multiple random shots that depict the actual shot peening is presented in this paper. The model is developed using the coupled finite and discrete element methods. The two numerical tools were coupled via code in ABAQUS, whereby shot–shot and shot–target interaction behaviors were accurately included. The induced compressive residual stress was computed due to the multiple random shots impact based on the Johnson–Cook material model. The model was experimentally validated and applied to evaluated the influence of shot velocity, shot size, and angle of impact on the final compressive residual stress.