Summary
Metamaterials are recognized as artificially microstructured media, exhibit distinct effective material properties, and can be tailored to achieve negative properties that inhibit the propagation of acoustic or elastic waves. Traditional linear metamaterials (LMs), relying on resonance mechanisms, are constrained by a narrow frequency band. In response to this, nonlinear metamaterials (NLMs) emerge as a solution, offering expanded bandwidth and advanced wave phenomena, surpassing the limitation of linear systems. This paper introduces an innovative approach for achieving an ultra-broad bandgap in NLMs, using a chain of resonator triplets, which exploits a novel combination of hardening and softening nonlinearities.
