在双面激光同时冲击金属薄板过程中,板料厚度是影响其冲击强化效果的重要因素。利用ABAQUS软件对双面激光同时冲击不同厚度的AM50镁合金板料进行模拟,系统研究了板料厚度对双面激光同时冲击强化效果的影响机理,对比分析了不同模型沿表面径向和轴向的残余应力分布。结果表明,在激光光斑直径、脉冲宽度、峰值压力不变的情况下,随着板料厚度增大,模型内部的残余压应力分布渐趋均匀和有规律,残余压应力影响深度逐渐变深,当板料厚度达到某一阈值后,两者都达到饱和。在激光峰值压力1600MPa、光斑半径3mm和压力脉冲宽度57ns工艺参数下,双面激光同时冲击AM50镁合金薄板的理想厚度为4mm及以上。 Sheet metal thickness is an important factor that affects the impact strengthening effect when the double-sided laser simultaneously impacts the metal sheet. ABAQUS software was used to simulate the impact of two-sided laser on the AM50 magnesium alloy sheets with different thickness at the same time. The influence mechanism of the sheet thickness on the simultaneous strengthening effect of the two-sided laser was systematically studied. The effects of different models along the radial and axial directions Residual stress distribution. The results show that with the increase of sheet thickness, the distribution of residual compressive stress in the model tends to be uniform and regular with the laser spot diameter, pulse width and peak pressure unchanged, and the influence depth of residual compressive stress becomes deeper. When the sheet thickness reaches a certain threshold, both are saturated. Under the laser peak pressure of 1600MPa, the spot radius of 3mm and the pressure pulse width of 57ns, the ideal thickness of AM50 magnesium alloy sheet with double-sided laser impacting at the same time is 4mm and above.