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Nguyen Tuan Son(우엔 두안 선),Yu Bin Kim(김유빈),Kee Bong Yoon(윤기봉) 대한기계학회 2010 대한기계학회 춘추학술대회 Vol.2010 No.11
Some of the equipment in liquefied natural gas (LNG) plant is repeatedly exposed to an extremely low temperature. Cyclic thermal shock loading is then applied to specific parts of the equipment. As a result, crack in those parts occurs and leads to failure. In this study, thermal shock analysis was conducted using a pin-loaded single edge crack tension specimen (ESET). Changes of temperature, stress distribution and stress intensity factor were investigated during a short time exposed to an extremely low temperature. Additionally, value of stress intensity factor obtained from finite element calculation was compared with theoretically estimated one (1). The comparison results were in a good agreement each other. In the future, this study will be extended to assess fatigue crack growth life due to cyclic cryogenic thermal shock.