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

The Society of Naval Architects of Korea (대한조선학회)
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Evaluation of Mechanical Performance of Membrane Type Secondary Barrier Anisotropic Composites depending on Fiber Direction

멤브레인 형 2차 방벽 이방성 복합재료의 섬유방향에 따른 기계적 성능 평가

  • Jeong, Yeon-Jae (Department of Naval Architecture and Ocean Engineering, Pusan National University) ;
  • Kim, Jeong-Dae (Department of Naval Architecture and Ocean Engineering, Pusan National University) ;
  • Hwang, Byeong-Kwan (Department of Naval Architecture and Ocean Engineering, Pusan National University) ;
  • Kim, Hee-Tae (Department of Naval Architecture and Ocean Engineering, Pusan National University) ;
  • Oh, Hoon-Gyu (Maritime Research Institute, Hyundai Heavy Industries Co. Ltd) ;
  • Kim, Yong-Tai (Maritime Research Institute, Hyundai Heavy Industries Co. Ltd) ;
  • Park, Seong-Bo (Maritime Research Institute, Hyundai Heavy Industries Co. Ltd) ;
  • Lee, Jae-Myung (Department of Naval Architecture and Ocean Engineering, Pusan National University)
  • 정연제 (부산대학교 조선해양공학과) ;
  • 김정대 (부산대학교 조선해양공학과) ;
  • 황병관 (부산대학교 조선해양공학과) ;
  • 김희태 (부산대학교 조선해양공학과) ;
  • 오훈규 ((주)현대중공업 선박연구소) ;
  • 김용태 ((주)현대중공업 선박연구소) ;
  • 박성보 ((주)현대중공업 선박연구소) ;
  • 이제명 (부산대학교 조선해양공학과)
  • Received : 2020.01.23
  • Accepted : 2020.04.09
  • Published : 2020.06.20
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Abstract

Recently, the size of Liquified Natural Gas (LNG) carriers has been increasing, in turn increasing the load generated during operation. To handle this load, the thickness of LNG Cargo Containment Systems (CCSs) should be increased. Despite increasing the thickness of LNG CCSs, a secondary barrier is still used in conventional thickness. Therefore, the mechanical performance of the existing secondary barrier should be verified. In this study, tensile test of the secondary barrier was performed to evaluate mechanical properties under several low- and cryogenic-temperature conditions considering LNG environment, and in each fiber direction considering that the secondary barrier is composed of anisotropic composite materials depending on the glass fibers. Additionally, the coefficient of thermal expansion was measured by considering the degradation of the mechanical properties of the secondary barrier caused by the generated thermal stress during periodical unloading. As a result, the mechanical performance of secondary barrier in the Machine Direction (MD) was generally found to be superior than that in the Transverse Direction (TD) owing to the warp interlock structure of the glass fibers.

Keywords

References

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