Vibration analysis of a composite elastic metamaterial plate based on a semi-analytical method Xingguo Wang, Lan Wang, Yongchun Xu and Haisheng Shu Eur. Phys. J. Appl. Phys., 98 (2023) 16 Published online: 10 March 2023 DOI: 10.1051/epjap/2023220225