An Analytical Method on Residual Stresses in Welded Built-Up Shell Structures
An Analytical Method on Residual Stresses in Welded Built-Up Shell Structures
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焊接组合壳结构残余应力的分析方法
DOI：
10.2534/jjasnaoe1968.1983.210
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发表时间：
1983
期刊：
影响因子：
--
通讯作者：
K. Matsuoka
中科院分区：
文献类型：
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作者：
K. Matsuoka
大多数钢壳结构都是通过焊接建立起来的。焊接残余应力和变形对壳体结构的静强度和疲劳强度有很大影响。而残余应力往往会引起应力腐蚀。为此，人们对管道环焊缝、直缝焊管等进行了大量的研究，但这些研究都是单独针对壳体进行的，对一般壳体焊接残余应力的研究还很少。本文论述了焊接组合壳体结构残余应力的分析方法。该方法是基于1）由于焊缝收缩的“内应力”的概念，2）Duhamel类比的扩展，3）弯曲焊缝的几何特征。该方法可用于一般形状壳体结构的焊接残余应力计算。本文给出了焊接组合壳结构（管道环焊缝、球壳环焊缝和直缝焊管）中残余应力的分析结果。结果与发表的实验结果进行了比较。分析结果与实验结果吻合较好。本文最后讨论了“固有应力”的计算公式和估算方法，它取决于焊接参数、焊缝的几何特征和材料特性（屈服应力）。
Most steel shell structures are built up with welding. The residual stresses and deformations due to welds have bad effects on the static and fatigue strength of shell structures. And the residual stresses often cause stress corrosion. Accordingly, many researches are brought out; on circumferential welds of pipes, straight seam welded pipes and so on. However, each of these researches separatly treats a shell in particular, and there have been little studies on residual stresses due to the weld of general shells.This paper deals with the analytical method on residual stresses in welded built-up shell structures. The method is based on 1) the concept of 'inherent stress' due to weld shrinkage, 2) the extension of Duhamel's analogy, and 3) the geometrical characteristics of curved weld beads. Using the method the welding residual stresses in general-shaped shell structures are able to be calculated. The analytical results of the residual stresses in welded built-up shell structures-circumferential welds of pipes, circumferential welds of spherical shells and straight seam welded pipes-are shown. The results are compared with published experimental results. The analytical results show good agreement with the experimental results. The final part of this paper deals with the formula and the estimating procedure of 'inherent stress'; that depends upon the welding parameters, the geometrical characteristics of weld beads and the material property (yield stress).