The Forming Limit Diagram of 2A16 Aluminum Alloy Sheet Based on Hydraulic Bulging Test of Elliptical DieZhihui Jiao, Yong Li, Peicheng Jiang, Kui Li and Lihui LangMATEC Web Conf., 401 (2024) 03003DOI: https://doi.org/10.1051/matecconf/202440103003