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

  • 제40권3호
  • /
  • Pages.45-53
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  • 2003
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  • 1225-1143(pISSN)
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  • 2287-7355(eISSN)
대한조선학회 (The Society of Naval Architects of Korea)
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과대하중이 피로수명에 미치는 영향에 관한 연구

A Study on the Effect of Overloading on Fatigue Life

  • 발행 : 2003.06.01
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초록

Ships and ocean structures are subjected to random loads caused by irregular waves. The irregularity of amplitude from random loading affects on fatigue crack growth and fatigue life. However the effects of irregularity of loading on fatigue including random loading have not been explained exactly. Therefore in this paper crack growth tests on DENT specimens under constant-amplitude loading including a single tensile overload are conducted to investigate the effect of overload on crack growth rate. The size of plastic zone and crack growth rate before and after a single tensile overloading are measured using ESPI system. Crack growth retardation model that is characterized by crack growth length and the size of plastic zone was proposed and compared with test result. From the research, the validity of proposed model is examined on crack growth retardation, and consequently fatigue life.

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참고문헌

  1. 김경수, 심천식, 2002, “전자스패클패턴 간섭시스템을 이용한 피로하중을 받는 균열선단에서 탄소성 영역 측정에 관한 연구,” 한국해양공학회지, 제 16권, 제 4호, pp. 3-18.
  2. 김경수, 심천식, 2002, “3D-ESPI 시스템을 이용하여 결정된 응력집중계수가 피로수명에 미치는 영향에 관한 연구,” 한국해양공학회지, 제 16권, 제 1호, pp. 46-51.
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피인용 문헌

  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