Phononic crystals (PCs) and metamaterials (MMs) can exhibit abnormal properties, even far
beyond those found in nature, through artificial design of the topology or ordered structure of …

In solid state physics, a bandgap (BG) refers to a range of energies where no electronic
states can exist. This concept was extended to classical waves, spawning the entire fields of …

Mechanical metamaterials exhibit some superior mechanical properties such as ultrahigh
strength-to-weight ratio, negative bulk-modulus, negative stiffness, negative mass-density …

Mechanical metamaterials, also known as architected materials, are rationally designed
composites, aiming at elastic behaviors and effective mechanical properties beyond ('meta') …

Introducing a negative-stiffness mechanism (NSM) into a traditional linear resonator to form
a high-static-low-dynamic-stiffness (HSLDS) resonator is an ideal way to create a low …

Willis materials exhibit macroscopic cross-coupling between particle velocity and stress as
well as momentum and strain. However, Willis coupling coefficients designed so far are …

Topological valley metamaterial in classical wave systems has shown great potential for
manipulating electromagnetic, acoustic, and elastic waves due to the defect-immune and …

To address the challenge of suppressing extremely-low frequency vibration and noise in
precision instruments and equipment, a novel non-contact metamaterial beams is proposed …

This work presents a novel strategy of broadband vibration attenuation using a graded
piezoelectric metamaterial beam. A series of electrode pairs with varying lengths are applied …

In this paper, a new composite metamaterial structure with negative effective mass density,
negative effective modulus, and an ultralarge Poisson's ratio is designed for vibration …