一种预测功率梁焊缝残余应力的有效建模方法

G. Horne, Danny L. Thomas, Andrew P. S. Collett, Andrew Clay, M. Cott, A. Moffat
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引用次数: 0

摘要

构件焊接残余应力的预测通常是结构完整性评估的重要输入。开发了一种有效的建模方法,用于预测功率梁焊缝中的残余应力,包括对残余应力测量的验证。具体而言,采用简化热源对316L奥氏体不锈钢各种几何形状的电子束焊缝进行了顺序耦合热-机械有限元分析,该热源根据焊缝宏观图和热电偶数据调整到观察到的熔合区。将预测的残余应力与轮廓法和中子衍射残余应力测量结果进行了比较。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
An Efficient Modelling Approach for Predicting Residual Stress in Power-Beam Welds
The prediction of welding residual stress in components is often an important input to structural integrity assessments. An efficient modelling approach was developed for predicting residual stress in power-beam welds, including validation against residual stress measurements. Specifically, sequentially coupled thermo-mechanical finite element analysis was conducted using a simplified heat source that was tuned to the observed fusion zone from a weld macrograph and thermocouple data for a series of electron beam welds in 316L austenitic stainless steel with a variety of geometries. The predicted residual stresses were compared with contour method and neutron diffraction residual stress measurements.
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