Elasto-Visco-Plastic-Damage Model for Pre-Strained 304L Stainless Steel subjected to Low Temperature

Primary barrier of membrane type LNG containment system consist of corrugated 304L stainless steel. This 304L stainless steel is austenitic stainless steel which shows dif ferent material behaviors owing to phase transformation during the plastic work. Even though corrugated primary barriers are subjected to significant amounts of pre-strain due to press working, quantit ative mechanical behavior on the effect of pre-straining at cryogeni c temperatures are not available. In this study, pre-strain level and pre-strain temperature dependent tensile tests are carried to investigate mechanical behaviors. Also, constitutive equations with material paramete rs are suggested for a verification study. Keywords—Constitutive equation, corrugated sheet, pre-strain effect, elasto-visco-plastic-damage model, 304L sta inless steel