Composite pentamode metamaterials with low frequency locally resonant characteristics

Zhaohong Wang, Yangyang Chu, Chengxin Cai, Guangshun Liu, Michael Renxun Wang

Research output: Contribution to journalArticle

5 Citations (Scopus)

Abstract

Locally resonant phononic crystals have excellent low-frequency characteristics and can result in a small size controlling a long wavelength. Based on the locally resonant phononic crystal theory, locally resonant pentamode metamaterials with composite materials are proposed and studied. The acoustic band frequencies of the locally resonant pentamode metamaterials were found to be two orders of magnitude smaller than those of conventional Bragg-Scattering pentamode metamaterials with the same lattice constant. Therefore, the single-mode frequency regions and locally resonant acoustic bandgaps which are under 110 Hz can be obtained by locally resonant pentamode metamaterials with a centimeter-scale lattice constant. The figure of merit can be increased by 60.78%-138.08%. This kind of locally resonant pentamode metamaterial opens a new path for applications in low-frequency acoustic cloaking and control of long wavelengths using small structure dimensions.

Original languageEnglish (US)
Article number025114
JournalJournal of Applied Physics
Volume122
Issue number2
DOIs
StatePublished - Jul 14 2017

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low frequencies
composite materials
acoustics
figure of merit
wavelengths
crystals
scattering

ASJC Scopus subject areas

  • Physics and Astronomy(all)

Cite this

Composite pentamode metamaterials with low frequency locally resonant characteristics. / Wang, Zhaohong; Chu, Yangyang; Cai, Chengxin; Liu, Guangshun; Wang, Michael Renxun.

In: Journal of Applied Physics, Vol. 122, No. 2, 025114, 14.07.2017.

Research output: Contribution to journalArticle

Wang, Zhaohong ; Chu, Yangyang ; Cai, Chengxin ; Liu, Guangshun ; Wang, Michael Renxun. / Composite pentamode metamaterials with low frequency locally resonant characteristics. In: Journal of Applied Physics. 2017 ; Vol. 122, No. 2.
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