Numerical analysis of mechanical modifications induced by laser shock peening on AA2024-T351 for aeronautical structures

Abstract

This work explores the impact of Laser Shock Peening (LSP) on the mechanical state of AA2024-T351 specimens used in the aerospace industry. Numerical simulations, conducted using ABAQUS/Explicit and based on the Johnson-Cook behavior model, examine the residual stresses and plastic deformations induced by a single circular laser impact. The results reveal that LSP, with a peak pressure of 3 GPa and a pulse duration of 25.8 ns, induces surface hardening and anisotropic compressive stresses, enhancing fatigue resistance. In-depth analysis shows that damage is concentrated around the impact center, remaining below 0.03. This study highlights the importance of optimizing LSP parameters to maximize its benefits while minimizing damage, thus contributing to the improved durability of aeronautical structures.