Two-dimensional locally resonant elastic metamaterials with chiral comb-like interlayers: Bandgap and simultaneously double negative properties

Yan-Feng Wang; Yue-Sheng Wang; Chuanzeng Zhang

doi:10.1121/1.4950766

Two-dimensional locally resonant elastic metamaterials with chiral comb-like interlayers: Bandgap and simultaneously double negative properties

J Acoust Soc Am. 2016 Jun;139(6):3311. doi: 10.1121/1.4950766.

Authors

Yan-Feng Wang¹, Yue-Sheng Wang¹, Chuanzeng Zhang²

Affiliations

¹ Institute of Engineering Mechanics, Beijing Jiaotong University, Beijing 100044, China.
² Department of Civil Engineering, University of Siegen, Siegen 57068, Germany.

PMID: 27369156
DOI: 10.1121/1.4950766

Abstract

In this paper, bandgap and dynamic effective properties of two-dimensional elastic metamaterials with a chiral comb-like interlayer are studied by using the finite element method. The effects of the geometrical parameters of the chiral comb-like interlayer on the band edges are investigated and discussed. Combined with the analysis of the vibration modes at the band edges, equivalent spring-mass/pendulum models are developed to investigate the mechanisms of the bandgap generation. The analytically predicted results of the band edges, including the frequency where the double negative properties appear, and the numerical ones are generally in good agreement. The research findings in this paper have relevant engineering applications of the elastic metamaterials in the low frequency range.

Publication types

Research Support, Non-U.S. Gov't