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Effects of Aramid Fiber on the Mechanical Properties of Secondary Barrier for LNG Cargo Containment System

LNG 화물창 2차 방벽의 기계적 성능에 아라미드 섬유가 미치는 영향에 대한 연구

  • Bang, Seoung-Gil (Department of Naval Architecture and Ocean Engineering, Pusan National University) ;
  • Yeom, Dong-Ju (Department of Naval Architecture and Ocean Engineering, Pusan National University) ;
  • Jeong, Yeon-Jae (Department of Naval Architecture and Ocean Engineering, Pusan National University) ;
  • Kim, Hee-Tae (Department of Naval Architecture and Ocean Engineering, Pusan National University) ;
  • Kim, Jeong-Dae (Department of Naval Architecture and Ocean Engineering, Pusan National University) ;
  • Lee, Jae-Myung (Department of Naval Architecture and Ocean Engineering, Pusan National University)
  • 방승길 (부산대학교 조선해양공학과) ;
  • 염동주 (부산대학교 조선해양공학과) ;
  • 정연제 (부산대학교 조선해양공학과) ;
  • 김희태 (부산대학교 조선해양공학과) ;
  • 김정대 (부산대학교 조선해양공학과) ;
  • 이제명 (부산대학교 조선해양공학과)
  • Received : 2021.01.11
  • Accepted : 2021.05.13
  • Published : 2021.08.20

Abstract

Recently, although the size of the LNG Cargo Containment System (CCS) has been increasing, the secondary barrier is reported to remain unchanged, and the conventional Flexible Secondary Barrier (FSB) used in Mark-III type has been pointed out to be vulnerable to failure owing to thermal and cyclic loads. In this respect, a tensile test was carried out to verify the reinforcing effect of FSB using aramid fiber on weft compared to the conventional FSB. In order to consider the LNG leakage situation, a series of tensile tests were conducted from ambient to cryogenic temperature, and mechanical properties were evaluated for each fiber direction on account of anisotropy. Tensile behavior and fracture analyses were performed to confirm the mechanical properties of each material according to temperature. Tensile test results proved that replacing the aramid fiber instead of E-glass fiber used on weft is effective in enhancing the mechanical properties.

Keywords

Acknowledgement

이 연구는 2019년도 산업통상자원부 및 산업기술평가관리원(KEIT) 연구비 지원에 의한 연구임(20006644, 20006632).

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