Optimum Design of Ply-up of T800 Carbon Fiber Composite Laminates with Holes Youhong Zhang, Jiaxiang Li, Chaofan Sun, Xinlong Chang and Chunguo Yue E3S Web of Conf., 406 (2023) 01030 Published online: 31 July 2023 DOI: 10.1051/e3sconf/202340601030