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研究基于激光冲击诱导残余应力产生原理,把激光冲击诱导的最终稳定的残余应力看成激光冲击引起的残余应力与为满足平衡而产生的残余应力的代数和,提出了残余应力预测方法。通过激光冲击平板件的残余应力预测发现,模拟结果与实验结果十分接近。说明此方法可实现对工件全尺寸的残余应力预测,为后续的分析提供了条件。另外,对激光冲击处理圆角试样产生的残余应力进行了模拟研究,发现工件的形状对最终稳定的残余应力的分布存在影响,表现为表面应力值和残余压应力的深度发生了变化。说明此方法可能实现激光冲击处理任意形状工件的残余应力预测。
Based on the principle of laser shock induced residual stress generation, the residual stress induced by laser shock is regarded as the algebraic sum of the residual stress caused by laser shock and the residual stress caused by the balance. The residual stress prediction method is proposed. The prediction of residual stress by laser shock plate shows that the simulation results are in good agreement with the experimental results. This method can predict the full-scale residual stress of the workpiece, which provides the conditions for the subsequent analysis. In addition, the residual stress produced by the laser impact treatment of the round specimen was simulated and found that the shape of the workpiece had an impact on the distribution of the final stable residual stress, which showed that the depth of surface stress and residual compressive stress changed. This method can be achieved by laser shock processing of any shape of the workpiece residual stress prediction.