Abstract: The theory governing breaking the reciprocity in acoustic metamaterials by using active eigen-structure control strategy is presented. Such theoretical foundation aims at demonstrating the ability of introducing controlled ...

Abstract: Acoustic metamaterials are those structurally engineered materials that are composed of periodic cells designed in such a fashion to yield specific material properties (density and bulk modulus) that would affect the wave ...

Abstract: A simple configuration of an active nonreciprocal gyroscopic metamaterial (NGMM) is presented. In the proposed NGMM system, a one-dimensional acoustic cavity is provided with piezoelectric boundaries acting as a collocated ...

Abstract: Equations governing different physical fields such as mechanical, acoustical, and electrical are inherently similar. This enables mechanical, thermal, and acoustical networks to be fully described with analogous electric ...

Abstract: Vibration characteristics of metamaterial beams manufactured of assemblies of periodic cells with builtin local resonances are presented. Each cell consists of a base structure provided with cavities filled by a viscoelastic ...

Abstract: A class of piezoelectric energy harvester is presented to harness the vibration energy from coupled acousticstructure systems such as those existing, for example, in aircraft acoustic cabin/flexible fuselage systems. Generic ...

Abstract: A comprehensive theoretical and experimental study is presented of the bandgap behavior of periodic viscoelastic material (VEM) composites subjected to impact loading. The composites under consideration consist of an ...