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A Study on Standardization of Fracture Strength of Secondary Barrier of FSB in MARK-III LNG CCS using Weibull Distribution

Weibull 통계분석을 이용한 MARK-III LNG CCS의 2차 방벽 FSB 파단강도 표준화 연구

  • 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) ;
  • 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) ;
  • 김희태 (부산대학교 조선해양공학과) ;
  • 김정대 (부산대학교 조선해양공학과) ;
  • 오훈규 ((주)현대중공업 선박연구소) ;
  • 김용태 ((주)현대중공업 선박연구소) ;
  • 박성보 ((주)현대중공업 선박연구소) ;
  • 이제명 (부산대학교 조선해양공학과)
  • Received : 2020.11.09
  • Accepted : 2021.03.12
  • Published : 2021.06.20

Abstract

In this study, the fracture strength of Flexible Secondary Barrier (FSB) composites was standardized by conducting a distribution analysis of the fracture probability, considering that the fracture strength of FSB composites such as glass fiber reinforced composites is relatively large. As the mechanical performance of FSB composites varies with the fiber direction, 20 replicate uniaxial tensile tests were performed for different temperatures ranging from the ambient to cryogenic conditions, considering the actual operating environment of liquefied natural gas. For the probability statistical analysis, the Weibull distribution analysis derived from the weakest link theory was used, considering the large variance in the fracture strength and brittle fracture behavior. The results of the Weibull distribution analysis were used to calculate the standard fracture strength of the FSB composites for different fiber directions. The findings can help ensure the reliability of the FSB mechanical properties in different fiber directions in the design of the secondary barrier and structural analyses.

Keywords

Acknowledgement

이 과제는 부산대학교 기본연구지원사업(2년)에 의하여 연구되었음.

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