Metamaterials for simultaneous acoustic and elastic bandgaps

Abstract In this work, we present a single low-profile metamaterial that provides bandgaps of acoustic and elastic waves at the same time. This was done by ensuring impedance mismatch in two different domains, the fluid domain where the acoustic waves propagate and the solid domain where the elastic...

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Autores principales:	Waiel Elmadih, Dimitrios Chronopoulos, Jian Zhu
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2021
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/f8fb3cb349e74545bfc69f871b8e558b
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spelling	oai:doaj.org-article:f8fb3cb349e74545bfc69f871b8e558b2021-12-02T16:26:23ZMetamaterials for simultaneous acoustic and elastic bandgaps10.1038/s41598-021-94053-32045-2322https://doaj.org/article/f8fb3cb349e74545bfc69f871b8e558b2021-07-01T00:00:00Zhttps://doi.org/10.1038/s41598-021-94053-3https://doaj.org/toc/2045-2322Abstract In this work, we present a single low-profile metamaterial that provides bandgaps of acoustic and elastic waves at the same time. This was done by ensuring impedance mismatch in two different domains, the fluid domain where the acoustic waves propagate and the solid domain where the elastic waves propagate. Through creatively designing the metamaterial, waves of certain nature and frequencies of interest were completely blocked in the solid and fluid domains simultaneously. The simulation results showed bandgaps with acoustic waves attenuation below 5 kHz and elastic waves attenuation below 10 kHz. The acoustic and elastic dispersion curves of the metamaterials were calculated for various designs with various diameters and neck lengths, and the bandgaps were calculated. These parameters can be used as means for tuning both the acoustic and elastic bandgaps. A representative design of the metamaterial was manufactured on a laser powder bed fusion system and the dynamic performance was measured at various points. The measurements were carried out using a dynamic shaker setup and the dynamic performance was in good agreement with the numerical modelling results. Such metamaterials can be used for simultaneous acoustic and elastic attenuation, as well as saving in space and material consumption, in various fields including building construction, automobile, aerospace and rocket design.Waiel ElmadihDimitrios ChronopoulosJian ZhuNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 11, Iss 1, Pp 1-10 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Waiel Elmadih Dimitrios Chronopoulos Jian Zhu Metamaterials for simultaneous acoustic and elastic bandgaps
description	Abstract In this work, we present a single low-profile metamaterial that provides bandgaps of acoustic and elastic waves at the same time. This was done by ensuring impedance mismatch in two different domains, the fluid domain where the acoustic waves propagate and the solid domain where the elastic waves propagate. Through creatively designing the metamaterial, waves of certain nature and frequencies of interest were completely blocked in the solid and fluid domains simultaneously. The simulation results showed bandgaps with acoustic waves attenuation below 5 kHz and elastic waves attenuation below 10 kHz. The acoustic and elastic dispersion curves of the metamaterials were calculated for various designs with various diameters and neck lengths, and the bandgaps were calculated. These parameters can be used as means for tuning both the acoustic and elastic bandgaps. A representative design of the metamaterial was manufactured on a laser powder bed fusion system and the dynamic performance was measured at various points. The measurements were carried out using a dynamic shaker setup and the dynamic performance was in good agreement with the numerical modelling results. Such metamaterials can be used for simultaneous acoustic and elastic attenuation, as well as saving in space and material consumption, in various fields including building construction, automobile, aerospace and rocket design.
format	article
author	Waiel Elmadih Dimitrios Chronopoulos Jian Zhu
author_facet	Waiel Elmadih Dimitrios Chronopoulos Jian Zhu
author_sort	Waiel Elmadih
title	Metamaterials for simultaneous acoustic and elastic bandgaps
title_short	Metamaterials for simultaneous acoustic and elastic bandgaps
title_full	Metamaterials for simultaneous acoustic and elastic bandgaps
title_fullStr	Metamaterials for simultaneous acoustic and elastic bandgaps
title_full_unstemmed	Metamaterials for simultaneous acoustic and elastic bandgaps
title_sort	metamaterials for simultaneous acoustic and elastic bandgaps
publisher	Nature Portfolio
publishDate	2021
url	https://doaj.org/article/f8fb3cb349e74545bfc69f871b8e558b
work_keys_str_mv	AT waielelmadih metamaterialsforsimultaneousacousticandelasticbandgaps AT dimitrioschronopoulos metamaterialsforsimultaneousacousticandelasticbandgaps AT jianzhu metamaterialsforsimultaneousacousticandelasticbandgaps
_version_	1718384091045298176

Metamaterials for simultaneous acoustic and elastic bandgaps

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