In this study, finite element analysis with LS-DYNA was applied to predicting deformation of the gas-formed wrinkles and thickness distribution along the edge of the strakelet. WANG et al [15] studied a multi-step methodology to improve the efficiency of blank optimization using LS-DYNA. LU [16] successfully predicted the wrinkled flange in the cylindrical drawing process, the circle hole expansion in the bore expanding process, and the square cup in the square cup drawing by LS-DYNA. LUO et al [6] and TANG et al [7] used a long rectangular die and commercial FEA codes established by correlation with SPF trials from an industrial SPF process. The codes were used for their predictive accuracy. These studies are early examples of
investigations on TSGF processes.