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FEM Simulation and Experimental Test on Residual Stress of Cold Expansion Hole of Rectangular Plate

机译：矩形板冷扩孔残余应力的有限元模拟与试验

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摘要

A 2D rectangular plate model has been established to study the residual stress fields of cold expansion hole. Experiments were carried out to measure the residual stress of cold expansion hole and verify simulation results. The FEM results show, with interference values developing, the maximum values of circumferential residual compressive/tensile stress increase and higher positive stress values are obtained at the boundary of the rectangular plate. However, higher positive stresses at the boundary of plate are harmful to the capacity of fatigue resistance, the determinations of best interference value to a certain wide plate were proposed. Finally, the effect of the plate width on the residual stress distribution was analyzed.
机译：建立了二维矩形板模型来研究冷膨胀孔的残余应力场。进行了实验以测量冷膨胀孔的残余应力并验证模拟结果。有限元结果表明，随着干扰值的增加，圆周残余压缩/拉伸应力的最大值增加，并且在矩形板的边界处获得了较高的正应力值。然而，板边界处较高的正应力会损害其抗疲劳能力，因此提出了对某宽板的最佳干涉值的确定方法。最后，分析了板宽对残余应力分布的影响。

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