狭開先溶接時における梨形ビード割れの解析と割れを考慮した溶接諸条件最適化システムの構築
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- Shibahara Masakazu
- 大阪府立大学大学院工学研究科
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- Dan Etsuo
- 大阪府立大学大学院工学研究科
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- Uneda Michio
- 金沢工業大学工学部
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- Masaoka Koji
- 大阪府立大学大学院工学研究科
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- Murakawa Hidekazu
- 大阪大学接合科学研究所
Bibliographic Information
- Other Title
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- キョウカイサキ ヨウセツジ ニ オケル ナシガタ ビード ワレ ノ カイセキ ト ワレ オ コウリョシタ ヨウセツ ショジョウケン サイテキカ システム ノ コウチク
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Abstract
To achieve high efficiency and cost reduction, large heat input welding such as submerged arc welding (SAW) and metal inert gas arc welding (MIG) using large currents are employed. However, the large heat input given to the weld may produce coarse grains in the HAZ and a reduction of toughness. To avoid these problems, narrow gap welding (NGW) which is effective in reducing heat input and achieving high productivity is often employed. However, the pear-shaped bead cracking may form according to the welding condition in the case of narrow gap welding. Therefore, the welding conditions must be carefully selected to prevent the cracks.In this study, the influences of the heat input parameters, such as heat input width, heat input depth and the total amount of heat input on the pear-shaped bead crack formation under narrow gap welding are investigated using the Thermal-elastic-plastic FEM with temperature dependent interface element. Furthermore, to find the optimum values of the heat input parameters, the optimization system which can consider the formation of pear-shaped bead cracking is developed.As optimization methods, Complex Method (CM) and Genetic Algorithm (GA) are adopted. Using these methods, the ideal heat input distribution to achieve deeper penetration with small heat input and without cracking can be computed. As a result, the superiority of the welding using narrow gap can be shown in the viewpoint of heat input efficiency.
Journal
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- Journal of the Japan Society of Naval Architects and Ocean Engineers
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Journal of the Japan Society of Naval Architects and Ocean Engineers 11 189-197, 2010
The Japan Society of Naval Architects and Ocean Engineers
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Details 詳細情報について
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- CRID
- 1390282680232703360
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- NII Article ID
- 10026570336
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- NII Book ID
- AA12057769
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- ISSN
- 18811760
- 18803717
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- NDL BIB ID
- 10789644
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- Text Lang
- ja
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- Data Source
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- JaLC
- NDL
- Crossref
- CiNii Articles
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- Abstract License Flag
- Disallowed