FINITE ELEMENT ANALYSIS OF THE EFFECT OF OIL JET PEENING PROCESS IN A MATERIAL

Oil peening is a new surface modification technique developed to introduce compressive residual stresses in metallic components. The magnitude and distribution of residual stresses and plastic strain in the oil peened AA6061-T4 alloy was evaluated using finite element method (FEM). The simulation of single drop impact against a plastically deformable material was performed. The contours of stress components are presented to show the formation of residual stress distribution. Finite element analysis reveals that the stress and strain patterns around the impact region of an oil drop during loading and unloading with different impact pressures. impact pressure significantly influences the axial displacement, residual pileup and residual stress.