中文摘要：

激光喷丸扫描路径前进方向对金属板料大面积激光喷丸效果有着直接的影响。通过ABAQUAS 有限元软件建立拉伸试样残余应力三维分析模型，研究了激光喷丸扫描路径前进方向对AM50 镁合金拉伸试样残余应力场的影响，以及双面同时冲击与双面间隔冲击之间的差异。结果表明，激光喷丸前进方向对残余应力均匀和一致性有决定性影响，并且双面激光同时冲击较双面激光间隔冲击有更好的效果。

英文摘要：

Advancing direction of massive laser shock peening （LSP） impacts often generates different residual stress distribution at the surface and along depth direction of metallic sheet. To investigate the effect of advancing direction of massive LSP impacts on the induced residual stress fields of AM50 Mg alloy tensile samples, a 3D analysis model is developed by using ABAQUS software. At the same time, the difference between the double- sided simultaneous LSP and double-sided non-simultaneous LSP impacts is also presented. Results show that advancing direction plays an important role in the generated residual stresses, and simultaneous LSP impacts can induce a better simulation results than non-simultaneous LSP.