Metamaterials and phononic crystals (PCs) with artificially designed periodic microstructures
have attracted increasing research interests due to their unique properties that cannot be …

Metamaterials are an emerging type of man-made material capable of obtaining some
extraordinary properties that cannot be realized by naturally occurring materials. Due to …

Despite their engineering significance, locally resonant metamaterials are facing the
challenge to cope with the need for broad-range band gap adjustment at low-frequencies …

Mechatronic metamaterials are of utmost significance in vibration isolation owing to their
tunable bandgaps. However, their intricate mechanisms are always challenging for …

In this work, we experimentally achieve 1-kHz-wide directional band gaps for elastic waves
spanning a frequency range from approximately 8 to 11 kHz. One-way propagation is …

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 …

While elastic metasurfaces offer a remarkable and very effective approach to the
subwavelength control of stress waves, their use in practical applications is severely …

A unique strategy by harnessing the concept of feedback control between the piezoelectric
bimorph sub-cells which are acting as sensor and actuator is conceptualized in this paper. In …

Piezoelectric metamaterial beams have received enormous research interest for the
applications of vibration attenuation and/or energy harvesting in recent years. This paper …

While negative capacitance (NC) element has the potential of increasing the apparent
electro-mechanical coupling in various piezoelectric applications, it generally requires a …