sus304l 겹칩용접부의 저온에서의 인장 및 피로강도에 관한 실험적 연구

초록

As LNG tank is operated around -162 ℃, an experimental approach on the cryogenic temperature tensile and fatigue strength of SUS304L lap joint weld is very important at the design stage of membrane type LNG tank. In this study, in order to estimate the tensile and fatigue strength of SUS304L lap joint weld at cryogenic temperature condition, tensile and fatigue tests were conducted. Also, S-N curves are presented with statistical testing method recommended by JSME. As a result of the experimental approach, the design guide of fatigue strength is proposed and that is expected to be useful for membrane type LNG tank design.