From process parameters to residual stress field: complete ultrasonic shot peening simulation

Author:  D. Gallitelli, E. Rouhaud, D. Retraint, J. Badreddine, C. Labergere, M. Francois
Source:  Conf Proc 2014: ICSP-12 Goslar, Germany (pgs.365-369)
Doc ID:  2014104
Year of Publication:  2014
Abstract:  
Shot peening is a pre-stressing surface treatment used in high-technological industries (aeronautics, nuclear) to enhance the mechanical characteristics and lifespan of mechanical parts. The component to be treated and spherical shot are placed within a treatment chamber; then the shot is projected onto the surface of the component. The multiple impacts induce compressive residual stresses in the material and enhance the surface characteristics and fracture resistance of the mechanical components. Modelling shot peening process is very complex as it involves several parameters such as shot velocity, mechanical properties of material, etc. The aim of this work is know the residual stress field after treatment using a simple model obtained with dimensional analysis exploiting experimental data. A comparison between experimental residual stress profile and computing residual stress profile is proposed. Using a model, which enables to track the motion of shot for ultrasonic shot peening (USP) and obtain the complete velocity distribution of the shot impacts, we can use á residual stress model for USP.