Effect of post processing of digital image correlation on obtaining accurate true stress-strain data for AISI 304L

The aim of this study is to provide a clear and accessible method obtain accurate true-stress strain data, extend the limited material data beyond ultimate tensile strength (UTS) for AISI 304L. 304L used outer construction some types nuclear transport packages, due its post-yield ductility high failure strain. Material UTS throughout literature. 3D digital image correlation (DIC) was during series uniaxial experiments. Direct extracted such as true instantaneous cross-sectional area testing that stress-strain response up could be created. Post processing DIC has considerable effect on accuracy produced. Influence subset size smoothing investigated by using finite element analysis inverse model force displacement in order determine stress curve. FE iteratively adapted, data. Results were validated matching experimental