International Journal of Precision Engineering and Manufacturing

Korean Society for Precision Engineering (한국정밀공학회)
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Analysis of Post-Weld Deformation at the Heat-Affected Zone Using External Forces Based on the Inherent Strain

  • Ha, Yun-Sok (Welding Research Part, SAMSUNG HEAVY INDUSTRIES CO, LTD. GEOJE SHIPYARD) ;
  • Jang, Chang-Doo (Dept. of Naval Architecture and Ocean Engineering, Seoul National University) ;
  • Kim, Jong-Tae (Dept. of Naval Architecture and Ocean Engineering, Seoul National University) ;
  • Mun, Hyung-Suk (Railway System & Safety Research Dept, Korea Railroad Research Institute)
  • Published : 2007.10.01
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Abstract

An analytical method to predict the post-weld deformation at the heat-affected zone (HAZ) is presented in this paper. The method was based on the assumption that the post-weld deformation is caused by external forces resulting from the inherent strain, which is defined as the irrecoverable strain after removing structural restraints and loadings. In general, the equivalent loading method can be used to analyze distortions in welding areas because it is efficient and effective. However, if additional loads are applied after welding, it is difficult to determine the final strain on a welded structure. To determine the final strain of a welded structure at the HAZ more accurately, we developed a modified equivalent loading method based on the inherent strain that incorporated hardening effects. The proposed method was applied to calculate the residual stress at the HAZ. Experiments were also conducted on welded plates to evaluate the validity of the proposed method.

Keywords

References

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