With the increase of the size of LNG (Liquefied Natural Gas) carriers, LNG cargo containment systems are exposed to more frequent severe sloshing impact actions. In design and construction of LNG carriers, dynamic failure of LNG cargo containment system (CCS) under repeated sloshing impact actions is a very important issue [1]. While the importance of dynamic strength characteristics of LNG cargo containment system is well recognized, no consideration with regard to the fatigue and fracture performance of insulation system toward the cryogenic environment is readily available. In this respect, a systematic experimental research is carried out for the assessment of fatigue and fracture strength of LNG insulation system at both ambient and cryogenic environments. This study begins with the fatigue test of LNG insulation system. In particular, the fatigue characteristic at the secondary barrier is explicitly considered. The effect of the density of R-PUF (Reinforced Poly-Urethane Foam) with respect to fatigue performance is investigated. In the later section, the fracture toughness of LNG Insulation system is characterized in terms of the critical strain energy release rate (GIC) in the context of linear elastic fracture mechanics (LEFM). The specimen geometries used in this study are the center-cracked and double-edge-cracked tension specimen according to ASTM standard [2]. Fracture toughness tests have been carried out for structural components of MARK III type LNG insulation system such as Reinforced Poly-Urethane Foam (Insulation material) and SUS 304L (Primary barrier) under ambient and cryogenic temperature.
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ASME 2011 International Mechanical Engineering Congress and Exposition
November 11–17, 2011
Denver, Colorado, USA
Conference Sponsors:
- ASME
ISBN:
978-0-7918-5494-5
PROCEEDINGS PAPER
Fatigue and Fracture Performance of Insulation System in LNG Carriers
Myung Hyun Kim,
Myung Hyun Kim
Pusan National University, Busan, South Korea
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Hyeon Su Kim,
Hyeon Su Kim
Pusan National University, Busan, South Korea
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Jae Myung Lee,
Jae Myung Lee
Pusan National University, Busan, South Korea
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Min Sung Chun,
Min Sung Chun
Samsung Heavy Industries, Co., Ltd., Geoje, Gyeongnam, South Korea
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Yang Do Kim,
Yang Do Kim
Pusan National University, Busan, South Korea
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Nam Hyun Kang
Nam Hyun Kang
Pusan National University, Busan, South Korea
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Myung Hyun Kim
Pusan National University, Busan, South Korea
Hyeon Su Kim
Pusan National University, Busan, South Korea
Jae Myung Lee
Pusan National University, Busan, South Korea
Min Sung Chun
Samsung Heavy Industries, Co., Ltd., Geoje, Gyeongnam, South Korea
Yang Do Kim
Pusan National University, Busan, South Korea
Nam Hyun Kang
Pusan National University, Busan, South Korea
Paper No:
IMECE2011-62630, pp. 253-262; 10 pages
Published Online:
August 1, 2012
Citation
Kim, MH, Kim, HS, Lee, JM, Chun, MS, Kim, YD, & Kang, NH. "Fatigue and Fracture Performance of Insulation System in LNG Carriers." Proceedings of the ASME 2011 International Mechanical Engineering Congress and Exposition. Volume 8: Mechanics of Solids, Structures and Fluids; Vibration, Acoustics and Wave Propagation. Denver, Colorado, USA. November 11–17, 2011. pp. 253-262. ASME. https://doi.org/10.1115/IMECE2011-62630
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