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 …

The advancement in electromagnetic metamaterials, which commenced three decades ago,
experienced a rapid transformation into acoustic and elastic systems in the forms of …

The study of phononic materials and structures is an emerging discipline that lies at the
crossroads of vibration and acoustics engineering and condensed matter physics. Broadly …

Dam** mechanical resonances is a formidable challenge in an increasing number of
applications. Many passive dam** methods rely on using low stiffness, complex …

Acoustic waves in a linear time-invariant medium are generally reciprocal; however,
reciprocity can break down in a time-variant system. In this Letter, we report on an …

Band gaps appear in the frequency spectra of periodic materials and structures. In this work
we examine flexural wave propagation in beams and investigate the effects of the various …

Propagation of elastic waves in acoustic metamaterials based on locally resonant
viscoelastic phononic crystals is discussed. A variational formulation of the complex band …

Using a generalized form of Bloch's theorem, we derive the dispersion relation of a viscously
damped locally resonant metamaterial modeled as an infinite mass-in-mass lumped …

This paper reports a comprehensive modeling and experimental characterization of a three-
dimensional phononic crystal composed of a single material, endowed with an ultra-wide …

This study proposes a viscoelastic metamaterial containing negative-stiffness elements,
which exhibits both a dam** enhancement effect and a tunable ultra-low frequency band …