선체 용접부의 균열진전 및 피로수명 예측에 관한 연구(II)
A Study of Crack Propagation and Fatigue Life Prediction on Welded Joints of Ship Structure(II)
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초록
The fatigue life of ship structure under cyclic loading condition is made up of initiationand 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 topredict 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.
Abstract
The fatigue life of ship structure under cyclic loading condition is made up of initiationand 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 topredict 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.
참고문헌 (6)
- Harter J.A, "AFGROW Users Guide and Technical Manual, AFRL-VA-WP-TR-2006- XXXX" (2006), Air Force Research Laboratory
- Jeon, Y.C, "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, 38(3), pp.93~106 (2003)
- Kim, K.S, "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 (2008)
- Lee, C.K, "Crack Propagation Analysis of VLCC Using Simplified K value Estimation Methods", Korean Society of Steel Construction, 13(1), pp.17~25 (2001)
- 이장현, 신종계, 김지훈, "비드의 용용상태를 고려한 가스메탈 아크용접의 3차원 열탄소성변형 해석", 대한조선학회 논문집, 39(1), pp.6~60 (2002), 대한조선학회
- Newman J.C, "An Empirical Stress-Intensity Factor Equation for the Surface Crack", Engineering Fracture Mechanics, 15, pp.185~192 (1981)