Shot Peening Modeling By Combining DEM And FEM

Author:  Bhuvaraghan, Potdar, Akkaram, Domas, McClain, Bhar
Source:  Conf Proc: ICSP-10 Tokyo, Japan 2008
Doc ID:  2008049
Year of Publication:  2008
Abstract:  
ABSTRACT Shot-peening process modeling has been a challenging task because of the complexity of the process. It is extremely time consuming to model individual shots in FE model in presence of contact and subsequently keep track of such shots. Discrete element method has evolved over the years and now commercially available software can be used to model individual shots and overall shot-peening process. However, major limitation of the current DEM based approach is that the method considers work piece material to be elastic only and thus is not able to explicitly model plastic deformation and residual stresses induced by shot-peening. A novel approach is proposed where; one can take spatial information of force vs. time from DEM solution and solve a transient problem with traction boundary conditions in either implicit solver like Ansys or explicit solver like Abaqus or LS-Dyna. The paper would present preliminary results and findings of this approach and discuss next limitations and advantages of such an approach. KEYWORDS: Shot Peening, Finite Element Method, Discrete Element Method