Elastic metamaterials with simultaneously negative effective shear modulus and mass density
Materials Science
2011-09-06 v1
Abstract
We propose a type of elastic metamaterial comprising fluid-solid composite inclusions which can possess negative shear modulus and negative mass density over a large frequency region. Such a solid metamaterial has a unique elastic property that only transverse waves can propagate with a negative dispersion while longitudinal waves are forbidden. This leads to many interesting phenomena such as negative refraction, which is demonstrated by using a wedge sample, and a significant amount of mode conversion from transverse waves to longitudinal waves that cannot occur on the interface of two natural solids.
Keywords
Cite
@article{arxiv.1102.4679,
title = {Elastic metamaterials with simultaneously negative effective shear modulus and mass density},
author = {Ying Wu and Yun Lai and Zhao-Qing Zhang},
journal= {arXiv preprint arXiv:1102.4679},
year = {2011}
}