Pad Force Required in Shear-deformation Sheet Forming of Curved Hat Channels for Ultra-High-Strength SteelsSaaya Kanayama, Tohru Yonebayashi, Yasuharu Tanaka and Shunji HiwatashiMATEC Web Conf., 408 (2025) 01032DOI: https://doi.org/10.1051/matecconf/202540801032