LNGC 2차 방벽에 적용된 Aramid 섬유의 Weibull 통계 분석을 이용한 피로특성 평가
Estimation of Fatigue Characteristics Using Weibull Statistical Analysis with Aramid Fiber on LNGC Secondary Barrier
2
조회
0
다운로드
2
인용
0
참고문헌
키워드
초록
Insulation systems in Liquefied Natural Gas Carriers (LNGC) are vulnerable to sloshing impact and fatigue loads because of waves. If gas leaks into the primary barrier, the Flexible Secondary Barrier (FSB) prevents the leakage of gas in this system. Fatigue strength of the FSB largely depends on the behavior of composite materials. In this study, a new system is applied to the FSB using aramid fiber to improve the fatigue strength of the secondary barrier, with the intention of replacing conventional E-glass fibers. The manufacturing method involved varying the ratio of the aramid fiber to the E-glass fiber for optimum design of the FSB. The fatigue tests results of the secondary barrier using aramid fiber were superior to that using E-glass fiber. The statistical analysis is performed to obtain the fatigue test results and estimate the probability of failure as well as the design guideline of LNGC secondary barriers.
Abstract
Insulation systems in Liquefied Natural Gas Carriers (LNGC) are vulnerable to sloshing impact and fatigue loads because of waves. If gas leaks into the primary barrier, the Flexible Secondary Barrier (FSB) prevents the leakage of gas in this system. Fatigue strength of the FSB largely depends on the behavior of composite materials. In this study, a new system is applied to the FSB using aramid fiber to improve the fatigue strength of the secondary barrier, with the intention of replacing conventional E-glass fibers. The manufacturing method involved varying the ratio of the aramid fiber to the E-glass fiber for optimum design of the FSB. The fatigue tests results of the secondary barrier using aramid fiber were superior to that using E-glass fiber. The statistical analysis is performed to obtain the fatigue test results and estimate the probability of failure as well as the design guideline of LNGC secondary barriers.
참고문헌 (8)
- Effertz, P.S., "Fatigue life assessment of friction spot welded 7050-T76 aluminium alloy using Weibull distribution", International Journal of Fatigue, 87, pp.381~390 (2016)
- Libin, Z., "A probabilistic model for strength analysis of composite double-lap single-bolt joints", Journal of Composite Structures, 161, pp.419~427 (2017)
- Maha, A, "Three-parameter vs. two-parameter Weibull distribution for pultruded composite material properties", Journal of Composite Structures, 58, pp.497~503 (2002)
- Oh, D.G., "Reliability evaluation of a LNGC insulation system with a metallic secondary barrier", Journal of Composite Structures, 171, pp.43~52 (2017)
- 박순철, "평직 CFRP 복합재료의 인장강도 및 파괴저항성 특성 평가", 한국마린엔지니어링학회지, 37(8), pp.862~868 (2013), 한국마린엔지니어링학회[DOI]
- Radhakrishnan, K., "Fatigue and reliability evaluation of unnotched carbon epoxy laminates", Journal of Composite Materials, 18(1), pp.21~31 (1984)
- Satoshi, N., "Statistical analysis to fatigue test data", Journal of the Society of Materials Science, 29(316), pp.24~29 (1980)
- Vorechovsky, M., "Incorporation of statistical length scale into Weibull strength theory for composites", Journal of Composite Structures, 92(9), pp.2027~2034 (2010)