首页> 外文期刊>日本船舶海洋工学会論文集 >溶接継手脆性き裂伝播挙動に及ぼす入熱・集合組織の影響: 溶接継手脆性き裂伝播のシミュレーション(第2報)
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溶接継手脆性き裂伝播挙動に及ぼす入熱・集合組織の影響: 溶接継手脆性き裂伝播のシミュレーション(第2報)

机译:热量输入和织构对焊接接头脆性裂纹扩展行为的影响:焊接接头脆性裂纹扩展的仿真(第二份报告)

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摘要

第1報では、溶接継手部の脆性き裂伝播挙動に及ぼす 残留応力と靭性の影響について、著者らの開発したモデル により数値解析的な検討を行った。その結果、日本造船 研究協会SR147研究部会の実験結果を詳細に説明できる 結果を得た。%In the previous paper, influence of applied stress, residual stress and toughness of welded joint on brittle crack propagation was analyzed based on a fracture mechanics model developed by the authors. This model assumes that a crack propagates along the cleavage plane with the highest tensile normal stress among the cleavage planes. Results of numerical simulation were compared with the experimental results which were carried out in the SR 147 research committee of the Shipbuilding Research Association of Japan, and it was shown that the model used could explain the experimental results. In this paper, influence of weld heat input and texture of base metal on brittle crack propagation behavior along welded joint is analyzed using the above mentioned model. Weld heat input involves influence of residual stress (small or large) and toughness of welded joint (welded joint is divided into weld metal, CGHAZ and other HAZ, and toughness of each zone is assumed to be different). Texture of base metal is reflected by normal distribution, and by random for comparison. It is concluded that crack propagation path is dependent very much on weld heat input, but is not dependent on texture of base metal when a crack propagates in welded joint.
机译:在第一份报告中,使用作者开发的模型对残余应力和韧性对焊接接头脆性裂纹扩展行为的影响进行了数值研究。结果,我们能够详细解释了日本造船研究协会的SR147研究小组的实验结果。 %在以前的论文中,基于作者建立的断裂力学模型分析了焊接接头的施加应力,残余应力和韧性对脆性裂纹扩展的影响,该模型假定裂纹沿拉伸面最大的分裂面扩展将解理平面之间的法向应力与数值模拟结果与日本造船研究协会SR 147研究委员会进行的实验结果进行了比较,结果表明所使用的模型可以解释实验结果。本文利用上述模型分析了焊接热输入和母材组织对脆性裂纹沿焊接缝扩展行为的影响,焊接热输入涉及残余应力(大小)和焊接接头(焊接接头)韧性的影响。分为焊缝金属,CGHAZ和其他HAZ,并且假定每个区域的韧性都不同)。结论是,裂纹扩展路径在很大程度上取决于焊接热输入,而在裂纹在焊接接头中扩展时则与母材组织无关。

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