Tunable fluid-solid metamaterials for manipulation of elastic wave propagation in broad frequency range
Abstract
Current strategies for designing tunable locally resonant metamaterials are based on tuning the stiffness of the resonator; however, this approach presents a major shortcoming as the effective mass density is constant at high frequency. Here, this paper reports a type of tunable locally elastic metamaterial-'called tunable fluid-solid composite'-inspired by the functions of heart and vessels in animals and humans. The proposed metamaterial consists of several liquid or gas inclusions in a solid matrix, controlled through a pair of embedded pumps. Both the band gap and effective mass density at high frequency can be tuned by controlling the liquid distribution in the unit cell, as demonstrated through a combination of theoretical analysis, numerical simulation, and experimental testing. Finally, we show that the tunable fluid-solid metamaterial can be utilized to manipulate wave propagation over a broad frequency range, providing new avenues for vibration isolation and wave guiding.
Keywords
Cite
@article{arxiv.1803.08655,
title = {Tunable fluid-solid metamaterials for manipulation of elastic wave propagation in broad frequency range},
author = {Quan Zhang and Kai Zhang and Gengkai Hu},
journal= {arXiv preprint arXiv:1803.08655},
year = {2018}
}