Journal of Welding and Joining

The Korean Welding and Joining Society (대한용접접합학회)
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Fatigue Crack Propagation Life Assessment of T-joint Fillet Weldment Considering Residual Stress under Random Loading

변동하중하의 잔류응력을 고려한 십자형 용접부의 잔존 수명 예측에 관한 연구

  • Kim, Sung-Hoon (Dept. of Naval Architecture and Ocean Engineering, Graduate School, Inha Univ.) ;
  • Kim, Kyung-Su (Dept. of Naval Architecture and Ocean Engineering, Inha University) ;
  • Lee, Jang-Hyun (Dept. of Naval Architecture and Ocean Engineering, Inha University) ;
  • Yoo, Chang-Hyuk (Dept. of Naval Architecture and Ocean Engineering, Graduate School, Inha Univ.) ;
  • You, Won-Hyo (Dept. of Naval Architecture and Ocean Engineering, Graduate School, Inha Univ.) ;
  • Yoo, Mi-Ji (Dept. of Naval Architecture and Ocean Engineering, Graduate School, Inha Univ.)
  • 김성훈 (인하대학교 대학원 조선해양공학과) ;
  • 김경수 (인하대학교 기계공학부 조선해양공학과) ;
  • 이장현 (인하대학교 기계공학부 조선해양공학과) ;
  • 유창혁 (인하대학교 대학원 조선해양공학과) ;
  • 유원효 (인하대학교 대학원 조선해양공학과) ;
  • 유미지 (인하대학교 대학원 조선해양공학과)
  • Received : 2010.05.17
  • Accepted : 2011.01.10
  • Published : 2011.04.30
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Abstract

This paper deals with the crack propagation life assessment of T-joint welded structure where typical fatigue cracks have been frequently initiated when the marine vessels experience the storm load. Welding residual stresses are calculated to investigate its effects on the fatigue life. Thereafter the residual stress distribution was applied to the AFGROW life prediction program, which incorporated the loading, the welding residual stress, and the geometric shape of the structure. The fatigue tests of the T-joint welded specimen under storm loading show the beach mark clearly generated on the fractured section of the weldment. The crack propagation life estimated based on the beach mark is compared with that of AFGROW to validate the life prediction. Based on the results, the evaluation method of the remaining fatigue life for T-joint fillet weldment of marine vessel's cargo hold with random load or storm load was established.

Keywords

References

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  1. An Experimental Study on Fatigue Life Evaluation of Welded Joints under Storm Loading vol.49, pp.1, 2012, https://doi.org/10.3744/SNAK.2012.49.1.99