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首页> 外文期刊>Bulletin of the American Physical Society >APS -APS March Meeting 2017 - Event - Residual Stress Analysis in Welded Component.
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APS -APS March Meeting 2017 - Event - Residual Stress Analysis in Welded Component.

机译：APS -APS 2017年3月会议-事件-焊接部件的残余应力分析。

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Due to local heating, thermal stresses occur during welding; and residual stress and distortion result remain welding. Welding distortion has negative effects on the accuracy of assembly, exterior appearance, and various strengths of the welded structures. Up to date, a lot of experiments and numerical analysis have been developed to assess residual stress. However, quantitative estimation of residual stress based on experiment may involve massive uncertainties and complexity of the measurement process. To comprehensively understand this phenomena, it is necessary to do further researches by means of both experiment and numerical simulation. In this research, we conduct Finite Element Analysis (FEA) for a simple butt-welded metal plate specimen. Thermal input and resultant expansion are modeled with a thermal expansion FEA module and the resultant constitutive response of the material is modeled with a continuous mechanic FEA module. The residual stress is modeled based on permanent deformation occurring during the heating phase of the material. Experiments have also been carried out to compare with the FEA results. Numerical and experimental results show qualitative agreement.~
机译：由于局部加热，在焊接过程中会产生热应力。残余应力和变形结果仍然存在。焊接变形对装配精度，外观和焊接结构的各种强度都有负面影响。迄今为止，已经开发了许多实验和数值分析来评估残余应力。然而，基于实验的残余应力的定量估计可能涉及巨大的不确定性和测量过程的复杂性。为了全面理解这种现象，有必要通过实验和数值模拟来做进一步的研究。在这项研究中，我们对一个简单的对焊金属板样品进行了有限元分析（FEA）。热输入和热膨胀通过热膨胀FEA模块建模，材料的本构响应通过连续机械FEA模块建模。基于材料加热阶段发生的永久变形对残余应力进行建模。还进行了实验以与FEA结果进行比较。数值和实验结果表明定性一致。

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