Abstract
In this study, laser shot peening (LSP) is applied to 2524 aluminum alloy (AA2524). The effects of LSP parameters (the range and the position of LSPed area and LSP times) on the residual stress distribution of the specimen are analyzed using ABAQUS software. The fatigue crack growth (FCG) experiment is conducted, and the FCG of both unpeened and LSPed specimens is simulated using the extended finite element method (XFEM). Then the Paris equation is used to predict specimens’ fatigue life. The results suggest that the compressive residual stress (CRS) gain effect increases as the width perpendicular to the crack tip increases in rectangular LSPed areas of the same size. Furthermore, when comparing specimens of LSPed area situated 0 and 3 mm from the fracture tip, it is observed that the specimen of LSPed area located 5 mm away exhibits the slowest rate of crack propagation.
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