论文部分内容阅读
采用ABAQUS有限元分析软件,建立了一种“焊接+激光冲击强化(LSP)”应力分布模型,研究了不同能量LSP对316L不锈钢氩弧焊焊缝区域应力分布及应变的影响。研究结果表明,由该模型模拟得到的残余应力分布与试验结果一致。LSP在焊缝区域表面诱导出残余压应力层,消除了焊接热影响引起的残余拉应力;随着激光脉冲能量的增大,激光冲击诱导的残余压应力以及压应力层厚度增加,但增加幅度减小;焊接件表面应变峰值随着激光脉冲能量的增加而增大。
The ABAQUS finite element analysis software was used to establish a “welding + laser shock enhancement (LSP)” stress distribution model to study the influence of different energy LSPs on the stress distribution and strain in the weld zone of 316L stainless steel. The results show that the residual stress distribution simulated by this model is consistent with the experimental results. LSP induced a residual compressive stress layer on the surface of the weld zone and eliminated the residual tensile stress caused by the welding heat influence. With the increase of the laser pulse energy, the residual compressive stress induced by laser shock and the thickness of the compressive stress layer increased, Decreases; the peak value of strain on the surface of the weldment increases with the increase of laser pulse energy.