Shot Peening FEM Simulation: A Novel Approach Based on Crystal Plasticity

Author:  A. Castro Moreno, F. Tu, M. Lévesque, P. Bocher
Source:  ICSP-13
Doc ID:  2017096
Year of Publication:  2017
Abstract:  
Introduction: Shot peening is widely used in automotive and aerospace industries to induce compressive residual stresses in the near surface of treated metal parts. These compressive stresses enhance the fatigue life of shot peened parts. Understanding how the stress state is created and how it changes depending on some process’ parameters is essential to optimize fatigue life. The Finite Element Method (FEM) has been extensively used to simulate the shot peening process at a macroscopic scale [1-3]. However, simulating shots impacts at the microscopic scale, to the best of our knowledge, has not been done yet. This might be related to the fact that Crystal Plasticity (CP)requires significant computer resources. In this work, a microscopic approach was explored to study the role of different microstructural features, like grain-to-shot size ratio or the local texture,on the residual stresses distribution.