Journal of Welding and Joining

The Korean Welding and Joining Society (대한용접접합학회)
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Numerical Analysis of Welding Residual Stresses for Ultra-thick Plate of EH40 TM and API 2W Gr.50 Steel Joined by Flux Core Arc Welding

EH40과 API2W강재의 극 후판재 다층 FCAW 버트 접합부 잔류응력해석

  • Hwang, Se-Yun (Dept. of Naval Architecture and Ocean Engineering, Graduate School, Inha University) ;
  • Lee, Jang-Hyun (Dept. of Naval Architecture and Ocean Engineering, Inha University) ;
  • Yang, Young-Sik (Dept. of Naval Architecture and Ocean Engineering, Graduate School, Inha University) ;
  • Lee, Sung-Je (Dept. of Naval Architecture and Ocean Engineering, Graduate School, Inha University) ;
  • Kim, Byung-Jong (Dept. of Naval Architecture and Ocean Engineering, Graduate School, Inha University)
  • 황세윤 (인하대학교 대학원 조선해양공학과) ;
  • 이장현 (인하대학교 공과대학 조선해양공학과) ;
  • 양용식 (인하대학교 대학원 조선해양공학과) ;
  • 이성제 (인하대학교 대학원 조선해양공학과) ;
  • 김병종 (인하대학교 대학원 조선해양공학과)
  • Received : 2009.12.17
  • Accepted : 2010.04.14
  • Published : 2010.06.30
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Abstract

Some structural members of large-scale marine vessels such as large-scale offshore structures and very large container ships are assembled by very thick plates of which thickness exceeds 60mm. Also, high-tensile steels have been selected to meet the required structural strength and fatigue strength. Generally, multi-pass welding method such as FCA(Flux-Core Arc) welding has been used to join the thick plates. Considering the welding residual stresses, fatigue strength of the welded joints of thick plates should be assured since the residual stress influences the fatigue strength. This paper presents a numerical procedure to investigate the residual stress of structure joined by multi-pass FCA welding so that it can be incorporated into the fatigue strength assessment considering the effect of welding residual stress. The residual stress distribution is also measured by X-Ray diffraction method. The residual stress obtained by the computational model also has been compared with that of experiment. The results of FEA are in very good agreement with the experimental measurements.

Keywords

References

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