This study examined the fatigue strength and fracture toughness of the structural components of membrane type liquefied natural gas carrier (LNGC) insulation systems, such as reinforced poly-urethane foam (R-PUF, insulation material) and 304 L stainless steel (STS 304 L, Primary barrier membrane), at both ambient and cryogenic temperatures. The fatigue strength of the LNGC insulation system was compared with that of low density R-PUF (130 kg/m3) and high density R-PUF (210 kg/m3). The fracture toughness of R-PUF and STS 304 L was investigated in terms of the density effect of R-PUF and the difference in the nickel composition of STS 304 L, STS 304 L (10.2%Ni) versus STS 304 L (9.4%Ni) at both ambient and cryogenic temperatures. In this study, the high density R-PUF (210 kg/m3) and STS 304 L (9.4%Ni) were proposed to improve the structural strength of the LNGC insulation system and reduce the cost. The fracture toughness was characterized in terms of the critical strain energy release rate (GIC) in the context of linear elastic fracture mechanics (LEFM). The geometries of the fracture toughness test used were the center-cracked tension (CCT) and double-edge-cracked tension (DECT) specimens according to ASTM STP381 standard.
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April 2013
Research-Article
A Comparative Evaluation of Fatigue and Fracture Characteristics of Structural Components of Liquefied Natural Gas Carrier Insulation System
Hyeon Su Kim,
Hyeon Su Kim
Graduate Student
e-mail: ssu3846@pusan.ac.kr
Department of Naval Architecture
and Ocean Engineering
,Pusan National University
,Busan 709-635
, Korea
e-mail: ssu3846@pusan.ac.kr
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Min Sung Chun,
Min Sung Chun
Senior Engineer
e-mail: minsung.chun@samsung.com
Marine Research Institute
,Samsung Heavy Industries, Co., Ltd.
,Geoje 656-710
, Korea
e-mail: minsung.chun@samsung.com
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Myung Hyun Kim
Myung Hyun Kim
1
Professor
Mem. ASME
e-mail: kimm@pusan.ac.kr
Mem. ASME
e-mail: kimm@pusan.ac.kr
Department of Naval Architecture
and Ocean Engineering
,Pusan National University
,Busan 709-635
, Korea
1Corresponding author.
Search for other works by this author on:
Hyeon Su Kim
Graduate Student
e-mail: ssu3846@pusan.ac.kr
Department of Naval Architecture
and Ocean Engineering
,Pusan National University
,Busan 709-635
, Korea
e-mail: ssu3846@pusan.ac.kr
Min Sung Chun
Senior Engineer
e-mail: minsung.chun@samsung.com
Marine Research Institute
,Samsung Heavy Industries, Co., Ltd.
,Geoje 656-710
, Korea
e-mail: minsung.chun@samsung.com
Jae Myung Lee
Myung Hyun Kim
Professor
Mem. ASME
e-mail: kimm@pusan.ac.kr
Mem. ASME
e-mail: kimm@pusan.ac.kr
Department of Naval Architecture
and Ocean Engineering
,Pusan National University
,Busan 709-635
, Korea
1Corresponding author.
Contributed by the Pressure Vessel and Piping Division of ASME for publication in the JOURNAL OF PRESSURE VESSEL TECHNOLOGY. Manuscript received January 26, 2012; final manuscript received July 18, 2012; published online March 18, 2013. Assoc. Editor: David L. Rudland.
J. Pressure Vessel Technol. Apr 2013, 135(2): 021405 (9 pages)
Published Online: March 18, 2013
Article history
Received:
January 26, 2012
Revision Received:
July 18, 2012
Citation
Su Kim, H., Sung Chun, M., Myung Lee, J., and Hyun Kim, M. (March 18, 2013). "A Comparative Evaluation of Fatigue and Fracture Characteristics of Structural Components of Liquefied Natural Gas Carrier Insulation System." ASME. J. Pressure Vessel Technol. April 2013; 135(2): 021405. https://doi.org/10.1115/1.4007473
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