“…Elastic metamaterials/metastructures (EMs) are artificial materials/structures composed of periodically arranged atom-like units (Jiang et al, 2020). The research on EMs has experienced increasing interest due to their unprecedented mechanical properties and adjustable structural dimensions (D'Alessandro et al, 2019;Muhammad and Lim, 2021a;Zhbadynskyi and Mykhasrkiv, 2018). However, one of the main focus areas is to obtain bandgaps, which can block wave propagation at certain frequency ranges (Kathryn et al, 2016;Jandron and Henann, 2018;Madeo et al, 2017;Vond rejc et al, 2017;Krushynska et al, 2017;Marco et al, 2018;D'Alessandro et al, 2019;Elmadih et al, 2019a;Guo et al, 2019;Aly et al, 2018).…”