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

The Society of Naval Architects of Korea (대한조선학회)
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Estimation of Fatigue Characteristics Using Weibull Statistical Analysis with Aramid Fiber on LNGC Secondary Barrier

LNGC 2차 방벽에 적용된 Aramid 섬유의 Weibull 통계 분석을 이용한 피로특성 평가

  • Park, Jin Hyeong (Department of Naval Architecture and Ocean Engineering, Pusan National University) ;
  • Oh, Dong Jin (Department of Naval Architecture and Ocean Engineering, Pusan National University) ;
  • Kim, Min Gyu (HANKUK CARBON CO., LTD) ;
  • Kim, Myung Hyun (Department of Naval Architecture and Ocean Engineering, Pusan National University)
  • Received : 2016.10.19
  • Accepted : 2017.09.09
  • Published : 2017.10.20
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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.

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References

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