Iterative substructure method employing concept of inherent strain for large-scale welding problems

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• 作者：Hidekazu Murakawa (1)
  Ninshu Ma (2)
  Hui Huang (3)
  
  1. Joining and Welding Research Institute ; Osaka University ; 11-1 Mihogaoka ; Ibaraki ; Osaka ; 567-0047 ; Japan
  2. JSOL Corporation ; Tosabori Daibiru Bldg. 2-2-4 Tosabori ; Nishi-ku ; Osaka ; 550-0001 ; Japan
  3. Graduate School of Engineering ; Osaka University ; 2-1 Yamadaoka ; Suita ; Osaka ; 567-0871 ; Japan
  
• 关键词：Distortion ; Finite element analysis ; Structures ; Stress ; Strain
• 刊名：Welding in the World
• 出版年：2015
• 出版时间：January 2015
• 年：2015
• 卷：59
• 期：1
• 页码：53-63
• 全文大小：6,278 KB
• 参考文献：1. Mochizuki M, Yamasaki H, Okano S, Toyoda M (2006) Distortion behavior of fillet T-joint during in-process control welding by additional cooling. Weld World 50(5鈥?):46鈥?0 266523" target="_blank" title="It opens in new window">CrossRef
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  5. Shibahara M, Itoh S, Serizawa H, Murakawa H (2005) Numerical prediction of welding hot cracking using three-dimensional FEM with temperature dependent interface element. Weld World 49(11鈥?2):50鈥?7 266502" target="_blank" title="It opens in new window">CrossRef
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  9. Shibahara M, Ikushima K (2010) Development of analytical method for welding mechanics using idealized explicit FEM. Trans JWRI 39鈥?:384鈥?86
  10. Murakawa H, Oda I, Itoh S, Serizwa H, Shibahara M, Nishikawa H (2004) Iterative substructure method for fast FEM analysis of mechanical problems in welding. Preprints of the National Meeting of JWS 75:274鈥?75
  11. Nishikawa H, Serizawa H, Murakawa H (2007) Actual application of FEM to analysis of large scale mechanical problems in welding. Sci Technol Weld Join 12鈥?:147鈥?52 29307X164274" target="_blank" title="It opens in new window">CrossRef
  12. Itoh S, Shibahara M, Serizawa H, Murakawa H (2009) Development of hierarchical multi-grid method and its application to the iterative substructure method. The Nineteenth International Offshore and Polar Engineering. Conference, International Society of Offshore and Polar Engineers
  
• 刊物主题：Metallic Materials; Continuum Mechanics and Mechanics of Materials; Theoretical and Applied Mechanics;
• 出版者：Springer Berlin Heidelberg
• ISSN：1878-6669

文摘

When structures such as ships, automobiles, and bridges are assembled by welding, distortion and residual stress are produced as unavoidable consequence of local shrinkage due to welding. The dimensional error deteriorates the performance of the structures and becomes an obstacle to achieve smooth manufacturing if the error exceeds the tolerable limit. On the other hand, residual stress plays an important role in crack initiation and fatigue life. Thus, it is necessary to predict the welding distortion and stress beforehand, so that effective measure and control can be taken. Since the welding is a highly nonlinear problem, it is difficult to predict the distortion quantitatively. For accurate prediction, finite element analysis (FEA) can be a powerful tool. In this research, an enhanced FEA scheme namely i-ISM is developed based on the inherent strain concept and iterative substructure method (ISM). Its capability of solving large-scale practical problems is demonstrated through typical models.