Journal of the Society of Naval Architects of Korea (대한조선학회논문집)

The Society of Naval Architects of Korea (대한조선학회)
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Fatigue Assessment of High Strength Steel with Butt Welded Joints for the Root Gap Difference

고강도강 맞대기 용접 시험편의 루트갭 변경에 따른 피로강도 평가

  • Kim, Ho-Jung (Department of Naval Architecture and Ocean Engineering, Pusan National University) ;
  • Kang, Sung-Won (Department of Naval Architecture and Ocean Engineering, Pusan National University) ;
  • Kim, Myung-Hyun (Department of Naval Architecture and Ocean Engineering, Pusan National University)
  • 김호정 (부산대학교 조선해양공학과) ;
  • 강성원 (부산대학교 조선해양공학과) ;
  • 김명현 (부산대학교 조선해양공학과)
  • Received : 2010.08.02
  • Accepted : 2010.11.10
  • Published : 2011.02.20
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Abstract

In this study, a series of fatigue tests was conducted to evaluate fatigue strength for the root gap difference with high strength steel with butt welded joints. A finite element analysis using effective notch stress method was also performed to compare effective notch factors each other with butt welded specimens made by copper backing. The results of fatigue tests were classified according to the root gap difference. Fatigue life of butt welded specimens is presented for determining the root gap of high strength steel with butt welded joints in terms of fatigue strength. Then effective notch stress was applied to interpret fatigue strength of butt welded specimen model which is reflected actual measured dimensions. As a result, fatigue strength of high strength steel with butt welded specimens is increased by root gap gets longer in length.

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References

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