Vibration attenuation using a 3D cubic re-entrant metamaterial structure with tunable bandgaps induced by variations in the re-entrant angleMusa Abubakar, Huaitao Shi, Xiaotian Bai, Tianzhi Yang, Ke Zhang and Xianming SunEPJ Appl. Metamat., 12 (2025) 5DOI: https://doi.org/10.1051/epjam/2025005