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

The Society of Naval Architects of Korea (대한조선학회)
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A Study of Crack Propagation and Fatigue Life Prediction on Welded Joints of Ship Structure (II)

선체 용접부의 균열진전 및 피로수명예측에 관한 연구(II)

  • Kim, Kyung-Su (Dept. of Naval Architecture & Ocean Engineering, Inha University) ;
  • Shim, Chun-Sik (Dept. of Naval Architecture and Marine Engineering, Mokpo National University) ;
  • Kwon, Young-Bin (Dept. of Naval Architecture & Ocean Engineering, Inha University) ;
  • Ko, Hee-Seung (Dept. of Naval Architecture & Ocean Engineering, Inha University) ;
  • Ki, Hyeok-Geun (Dept. of Naval Architecture & Ocean Engineering, Inha University) ;
  • Viswanathan, K.K. (Dept. of Naval Architecture & Ocean Engineering, Inha University)
  • 김경수 (인하대학교 선박해양공학과) ;
  • 심천식 (국립 목포대학교 기계.선박해양공학부) ;
  • 권영빈 (인하대학교 선박해양공학과) ;
  • 고희승 (인하대학교 선박해양공학과) ;
  • 기혁근 (인하대학교 선박해양공학과) ;
  • Published : 2008.12.31
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Abstract

The fatigue life of ship structure under cyclic loading condition is made up of crack initiation and propagation stages. For a welding member in ship structure, the fatigue crack propagation life is more important than the fatigue crack initiation life. To calculate precisely the fatigue crack propagation life at the critical welding location, the knowledge of the residual stress sensitivity on the fatigue strength is necessary. In this study, thermo elastic-plastic analysis was conducted in order to examine the effect of residual stress on the fatigue crack propagation life. Also the fatigue crack propagation lives considering residual stress were calculated using fatigue crack growth code, AFGROW, on the basis of fracture mechanics. AFGROW is widely used for fatigue crack growth predictions under constant and variable amplitude loading. The reliability of AFGROW on the fatigue of ship structure was confirmed by the comparison of the estimated results with the fatigue propagation test results.

Keywords

References

  1. Harter J.A., 2006, AFGROW Users Guide and Technical Manual, AFRL-VA-WP-TR-2006-XXXX, Air Force Research Laboratory
  2. Jeon, Y.C., Kim, Y.I., Kang, J.K. and Han, J.M., 2003, " A Study on Fatigue Life Prediction of Welded joints Through Fatigue Test and Crack Propagation Analysis," Journal of the Society of Naval Architects of Korea, Vol. 38, No. 3, pp. 93-106
  3. Kim, B.I. and Kwon, Y.B., 2008, " A Study of Crack Propagation and Fatigue Life Prediction on Welded Joints of Ship Structure," Proceedings of the Annual Autumn Meeting the Society of Naval Architects of Korea, pp. 984-992
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  5. Lee, J.H., Shin, J.G. and Kim, J.H., 2002, " Three Dimensional Thermal-Elastic Analysis of GMAW considering the Melting of Weld Bead," Journal of the Society of Naval Architects of Korea, Vol. 39, No. 1, pp. 49-60 https://doi.org/10.3744/SNAK.2002.39.1.049
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