激光焊接接头的数值模拟：现代疲劳分析方法

Q4 Engineering Rakenteiden Mekaniikka Pub Date : 2020-10-22 DOI:10.23998/RM.77613

R. Kokko, J. Vaara, T. Kuivaniemi, T. Frondelius

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引用次数: 2

摘要

焊接总是在结构中引起不连续性和缺陷，从而导致潜在的疲劳裂纹。焊接会影响热应变，热应变会产生结构的残余应力，对结构的疲劳行为产生显著影响。焊接不可避免地会导致焊接区域的微观结构和几何形状发生变化。可以对材料内部变化、残余应力和微观结构变化进行数值模拟，模拟结果可用于有限元分析中的循环载荷分析。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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Numerical simulation of laser welded joints: modern fatigue analysis methodology

Welding always induces discontinuities and imperfections in the structure that allows for potential fatigue cracks. Welding eﬀects thermal strains, which yield to residual stresses of the structure that have a noticeable eﬀect on the fatigue behaviour of the structure. Welding inexorably leads to microstructure and geometry changes in the welding region. Material internal changes, residual stresses and microstructural changes can be simulated numerically, and the simulation results can be used in cyclic loading analysis in FEA.

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