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利用ABAQUS模拟2024铝制圆杆经激光冲击后的动态响应,研究了激光诱导的应力波沿纵向和横向的衰减特性,讨论了杆径对应力波峰值随传播距离衰减的影响,对比分析了杆径对残余应力场的影响。结果表明:强激光诱导的应力波峰值在圆杆中沿纵向和横向均随传播距离的增大而逐渐减小,同时波形出现“弥散”现象。应力波峰值的衰减速度呈先快后慢的趋势。随着杆径增大,圆杆内部的残余应力场逐渐趋于均匀,残余压应力层深度增大并趋于饱和。
Using ABAQUS to simulate the dynamic response of 2024 aluminum rod after laser shock, the attenuation characteristics of laser-induced stress wave in both longitudinal and transverse directions were studied. The effect of rod diameter on the attenuation of peak value of stress wave with propagation distance was discussed. Effect of Trajectory on Residual Stress Field. The results show that the peak value of the stress wave induced by strong laser decreases gradually with the increase of propagation distance in the longitudinal and transverse directions of the rod, and the waveform appears “disperse ” phenomenon. The decay rate of stress wave peak is the first fast and then slow. As the diameter of the rod increases, the residual stress field in the rod gradually becomes uniform and the depth of the residual compressive stress layer increases and tends to be saturated.