한국해양공학회:학술대회논문집 (Proceedings of the Korea Committee for Ocean Resources and Engineering Conference)

한국해양공학회 (Korean Society of Ocean Engineers)
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외부하중에 의한 용접 체결부의 잔류응력 이완 특성 해석에 관한 연구

Analysis of Residual Stress Relaxation in Welded Joints due to External Loads

  • 장창두 (서울대학교 조선해양공학과) ;
  • 송하철 (서울대학교 조선해양공학과) ;
  • 조영천 (서울대학교 조선해양공학과 대학원)
  • Jang, Chang-Doo (Dept. of Naval Architecture and Ocean Engineering, Seoul National University) ;
  • Song, Ha-Cheol (Dept. of Naval Architecture and Ocean Engineering, Seoul National University) ;
  • Jo, Young-Chun (Graduate School, Dept. of Naval Architecture and Ocean Engineering, Seoul National University)
  • 발행 : 2003.10.24
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초록

Thermal elastic-plastic analysis was performed to assess the initial residual stress distribution of welded joints considering temperature dependent material properties. The test model was the idealized boxing fillet specimen, frequently appeared in the joints of longitudinal and transverse members of ship structure. Residual stress relaxations due to external loads were analyzed by subsequent elastic-plastic analysis considering loading and unloading steps, and the characteristics of residual stress relaxations were discussed with the levels of external loads. Additionally, to define the fatigue life of crack initiation and propagation, the S-N data for each crack length were appraised.

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