LNG탱크용 알루미늄합금 A5083-O의 관통균열 전파거동 예측 모델

The leak before break(LBB) concept is generalized on the design of LNG tanks, pressure vessels and nuclear reactor in that any leakage of containment, in whatever amount, will not result in catastropic failure. For this purpose it is necessary to determine the surface crack shape, the opening displa...

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Published inHan-guk haeyang gonghak hoeji (Online) Vol. 12; no. 1; pp. 50 - 57
Main Authors 김영식(Young-Sik Kim), 조상명(Sang-Myung Cho), 김종호(Jong-Ho Kim)
Format Journal Article
LanguageKorean
Published 한국해양공학회 1998
Subjects
Fatigue fracture(피로파괴)
LNG(액화천연가스)
Fracture toughness(파괴인성)
2차 방벽 (Secondary barrier)
Through crack(관통균열)
LBB(파단 전 누설)
2
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ISSN1225-0767
2287-6715

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Abstract The leak before break(LBB) concept is generalized on the design of LNG tanks, pressure vessels and nuclear reactor in that any leakage of containment, in whatever amount, will not result in catastropic failure. For this purpose it is necessary to determine the surface crack shape, the opening displacement and the risk of catastropic brittle fracture when it becomes a through crack. In this study the crack propagation behavior of surface flaws and the crack opening displacement of through cracks under combined membrane and bending stresses were investigated with fatigue tests and fracture toughness test of aluminium alloy A5083-O. And fracture mechanics analysis of the crack opening displacement of through cracks were made in order to develop a new model expressing the behaviors of COD under combined membrane and bending stresses.
AbstractList The leak before break(LBB) concept is generalized on the design of LNG tanks, pressure vessels and nuclear reactor in that any leakage of containment, in whatever amount, will not result in catastropic failure. For this purpose it is necessary to determine the surface crack shape, the opening displacement and the risk of catastropic brittle fracture when it becomes a through crack. In this study the crack propagation behavior of surface flaws and the crack opening displacement of through cracks under combined membrane and bending stresses were investigated with fatigue tests and fracture toughness test of aluminium alloy A5083-O. And fracture mechanics analysis of the crack opening displacement of through cracks were made in order to develop a new model expressing the behaviors of COD under combined membrane and bending stresses.
Author 조상명(Sang-Myung Cho)
김영식(Young-Sik Kim)
김종호(Jong-Ho Kim)
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DocumentTitle_FL A Model Estimating the Propagation Behavior of through cracks in Aluminum Alloy A5083-O for LNG Tank
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Keywords Fatigue fracture(피로파괴)
LNG(액화천연가스)
Fracture toughness(파괴인성)
2차 방벽 (Secondary barrier)
Through crack(관통균열)
LBB(파단 전 누설)
2
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Title LNG탱크용 알루미늄합금 A5083-O의 관통균열 전파거동 예측 모델
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