界面要素を用いたFEMによる溶接高温割れに関する理論的研究(第五報) : 板継溶接時における横収縮および端部割れに及ぼすルートギャップ,仮付け,タブ板の影響

概要

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In shipbuilding, it is necessary to join large plates by butt-welding. However, it is impossible to avoid the deformation during welding. Thus, the prediction and control of the welding deformation are very important for assembly of ship structures with high precision. To analyze butt-welding deformation accurately, it is necessary to take into consideration the influence of the root gap and the tack welds. In this report, in order to consider the influence of the root gap and the tack welds, finite element method (FEM) for welding deformation using interface element is proposed. A characteristic of this method is the use of the temperature dependent interface element to model the root gap. Using this method, optimum interval of tack welds can be investigated. Proposed method coupled with existing analytical method for hot cracking can be applied to analyze the formation and the propagation of end cracking with considering the behavior of root gap. In this report, the usefulness of the proposed method is demonstrated through the analysis of butt-welding.
社団法人日本船舶海洋工学会の論文
2002-03-25