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(I)

선체 용접부의 균열진전 및 피로수명 예측에 관한 연구(I)

  • Published : 2008.12.31
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Abstract

The fatigue life of ship structure under cyclic loading condition is made up of initiation and propagation stages. In this study, crack growth test is carried out on large scale structure test specimens and fracture mechanical analysis is performed. The fatigue lives measured from fatigue tests are compared with DNV, Matsuoka and BS 5400 S-N curve. And to predict the crack initiation life, S-N curve, corresponding to crack length 20mm at welded joint, is developed based on hot spot stress range. Also crack propagation life is calculated using crack growth equation. Consequently, computed crack propagation life is compared with experiment results.

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References

  1. Det Norske Veritas(DNV), 2003, Fatigue Assessment of Ship Structures, Classification Notes, No. 30.7
  2. Jeon, Y.C., Kim, Y.I., Kang, J.K. and Han, J.M., 2001, " A Study on Fatigue Life Prediction of Welded Joints Through Fatigue Tesh and Crack Propagation Analysis," Journal of the Society of Naval Architects of Korea, Vol. 38, No. 3, pp. 93-106
  3. Kim, C.W., Kim, D.S. and Nho, I.S., 2002, " Fatigue Life Assessment of Ship Structures based on Crack Propagation Analysis," Journal of the Society of Naval Architects of Korea, Vol. 39, No. 1, pp. 90-99 https://doi.org/10.3744/SNAK.2002.39.1.090
  4. Lee, C.K. and Kim, S.C., 2001, " Crack Propagation Analysis of VLCC Using Simplified K value Estimation Methods," Korean Society of Steel Construction, Vol. 13, No. 1, pp. 17-25
  5. Matsuoka, K., and Fujii, E., 1995, " An Evaluation Method on Fatigue Crack Initiation Life at Welded Joints in Steel Structures." Journal of the Society of Naval Architects of Japan, Vol. 178, pp. 513-522
  6. Newman, J.C. and Raju, I.S., 1981, " An Empirical Stress-Intensity Factor Equation for the Surface Creack," Engineering Fracture Mechanics, Vol. 15, pp. 185-192 https://doi.org/10.1016/0013-7944(81)90116-8
  7. The British Standards Institution BS5400, 1980, Steel Concrete and Composite Bridges Code of Practice for Fatigue
  8. Verreman, Y., Bailon, J.P. and Masounave, J., 1987, " Fatigue Life Prediction of Welded Joints-A Re-Assessment," Fatigue & Fracture of Engineering Materials and Structure, Vol. 10, No. 1, pp. 17-36 https://doi.org/10.1111/j.1460-2695.1987.tb01146.x

Cited by

  1. Experiments and Finite Element Analysis for the Estimation of Stress Relief in Welded Structures vol.48, pp.3, 2011, https://doi.org/10.3744/SNAK.2011.48.3.238
  2. 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