Numerical Simulation on Residual Stress Field of Flat‐Topped Laser Oblique Shocking of Ni‐Based Alloy GH4169

Abstract

This paper is based on laser shock peening (LSP) system with a flat‐topped beam, using robot simulation software to determine the oblique shock angle of different areas of a certain turbine disk mortise. Three‐dimensional finite element analysis was used to study residual stress field of Ni‐based alloy GH4169 under flat‐topped laser oblique shocking. The effects of different laser energy and different shocking number on residual stress field of Ni‐based alloy GH4169 of LSP were studied. Three‐dimensional finite element analysis used super‐Gaussian beam distribution to construct spatial distribution model of shock wave induced by LSP. The simulation results were in good agreement with the experimental results. The research results will provide a theoretical basis for LSP of certain turbine disk mortise.