Broadband dual-anisotropic solid metamaterials

Abstract We have proposed solid elastic metamaterials with anisotropic stiffness and inertial mass simultaneously, denoted as the dual anisotropy, for the potential use of elastic wave controlling. The dual anisotropy has been designed weakly dispersive in a broad frequency range, wherein broadband...

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Autores principales:	Yong Cheng, Xiaoming Zhou, Gengkai Hu
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2017
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/76a0a5f9d5da4797986b54b95c781bb6
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spelling	oai:doaj.org-article:76a0a5f9d5da4797986b54b95c781bb62021-12-02T15:05:04ZBroadband dual-anisotropic solid metamaterials10.1038/s41598-017-13322-22045-2322https://doaj.org/article/76a0a5f9d5da4797986b54b95c781bb62017-10-01T00:00:00Zhttps://doi.org/10.1038/s41598-017-13322-2https://doaj.org/toc/2045-2322Abstract We have proposed solid elastic metamaterials with anisotropic stiffness and inertial mass simultaneously, denoted as the dual anisotropy, for the potential use of elastic wave controlling. The dual anisotropy has been designed weakly dispersive in a broad frequency range, wherein broadband anisotropic mass is achieved by employing the sliding-interface concept in fluid-solid composites. Results have been validated through the band-structure, effective-medium, and modal-field analyses. We have further found that the proposed solid metamaterial, when its shear stiffness is diminished until neglected, would reduce to the pentamode-inertial material model. This reduced model is the general form of mediums following transformation acoustic theory, which has been proved vital for acoustic wave controlling. Our studies are expected to pave a new route toward broadband acoustic and elastic wave controlling using dual-anisotropic solid metamaterials.Yong ChengXiaoming ZhouGengkai HuNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 7, Iss 1, Pp 1-7 (2017)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Yong Cheng Xiaoming Zhou Gengkai Hu Broadband dual-anisotropic solid metamaterials
description	Abstract We have proposed solid elastic metamaterials with anisotropic stiffness and inertial mass simultaneously, denoted as the dual anisotropy, for the potential use of elastic wave controlling. The dual anisotropy has been designed weakly dispersive in a broad frequency range, wherein broadband anisotropic mass is achieved by employing the sliding-interface concept in fluid-solid composites. Results have been validated through the band-structure, effective-medium, and modal-field analyses. We have further found that the proposed solid metamaterial, when its shear stiffness is diminished until neglected, would reduce to the pentamode-inertial material model. This reduced model is the general form of mediums following transformation acoustic theory, which has been proved vital for acoustic wave controlling. Our studies are expected to pave a new route toward broadband acoustic and elastic wave controlling using dual-anisotropic solid metamaterials.
format	article
author	Yong Cheng Xiaoming Zhou Gengkai Hu
author_facet	Yong Cheng Xiaoming Zhou Gengkai Hu
author_sort	Yong Cheng
title	Broadband dual-anisotropic solid metamaterials
title_short	Broadband dual-anisotropic solid metamaterials
title_full	Broadband dual-anisotropic solid metamaterials
title_fullStr	Broadband dual-anisotropic solid metamaterials
title_full_unstemmed	Broadband dual-anisotropic solid metamaterials
title_sort	broadband dual-anisotropic solid metamaterials
publisher	Nature Portfolio
publishDate	2017
url	https://doaj.org/article/76a0a5f9d5da4797986b54b95c781bb6
work_keys_str_mv	AT yongcheng broadbanddualanisotropicsolidmetamaterials AT xiaomingzhou broadbanddualanisotropicsolidmetamaterials AT gengkaihu broadbanddualanisotropicsolidmetamaterials
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Broadband dual-anisotropic solid metamaterials

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