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

The Society of Naval Architects of Korea (대한조선학회)
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Mechanical Properties Analysis of Epoxy and Polyurethane Adhesive for Accurate Structural Analysis of LNG Cargo Hold

LNG 화물창 정밀 구조해석을 위한 에폭시와 폴리우레탄 접착제 기계적 물성치 분석

  • Jeong, Yong-Cheol (Department of Architecture and Ocean Engineering, Pusan National University) ;
  • Jeong, Yeon-Jae (Department of Architecture and Ocean Engineering, Pusan National University) ;
  • Kim, Jeong-Dae (Department of Architecture and Ocean Engineering, Pusan National University) ;
  • Park, Seong-Bo (Maritime Research institute, Hyundai Heavy Industries Co. Ltd) ;
  • Kim, Yong-Tai (Maritime Research institute, Hyundai Heavy Industries Co. Ltd) ;
  • Oh, Hoon-Gyu (Maritime Research institute, Hyundai Heavy Industries Co. Ltd) ;
  • Lee, Jae-Myung (Department of Architecture and Ocean Engineering, Pusan National University)
  • 정용철 (부산대학교 조선해양공학과) ;
  • 정연제 (부산대학교 조선해양공학과) ;
  • 김정대 (부산대학교 조선해양공학과) ;
  • 박성보 ((주)현대중공업 선박연구소) ;
  • 김용태 ((주)현대중공업 선박연구소) ;
  • 오훈규 ((주)현대중공업 선박연구소) ;
  • 이제명 (부산대학교 조선해양공학과)
  • Received : 2020.09.14
  • Accepted : 2020.12.03
  • Published : 2021.04.20
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Abstract

As the demand for natural gas that satisfies environmental regulations increases, the quantities of natural gas cargo that carrier can load is also increasing. Natural gas is transported in a liquefied state at -163 ℃ to increase loading efficiency. Among several LNG CCS types, MARK-III types are generally adopted in terms of loading efficiency. The secondary barrier adhesives of the MARK-III, nevertheless, is subjected to tensile stress due to thermal contraction and tension in the environment. In terms of these reasons, local analysis of the adhesive to evaluate the stress state must be carried out. According to previous studies, local analysis is unavailable since material properties for secondary barrier adhesives have not been reported. Thus, in this study, the cryogenic tensile test and coefficient of thermal expansion of epoxy and polyurethane (PU15, PU45), which are most widely used at cryogenic temperatures, were experimentally analyzed. At cryogenic temperature, the mechanical behavior of the polyurethane adhesive was better than epoxy of the adhesive. the joint of FSB and epoxy adhesive of the secondary barrier has the maximum coefficient of thermal expansion difference at 25 ℃ and minimum at -150 ℃, respectively.

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References

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