Broadband Bending of Flexural Waves: Acoustic Shapes and Patterns

Abstract Directing and controlling flexural waves in thin plates along a curved trajectory over a broad frequency range is a significant challenge that has various applications in imaging, cloaking, wave focusing, and wireless power transfer circumventing obstacles. To date, all studies appeared con...

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Autores principales:	Amir Darabi, Ahmad Zareei, Mohammad-Reza Alam, Michael J. Leamy
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2018
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/a670274d1d51492ba219084ae041fbca
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spelling	oai:doaj.org-article:a670274d1d51492ba219084ae041fbca2021-12-02T15:08:06ZBroadband Bending of Flexural Waves: Acoustic Shapes and Patterns10.1038/s41598-018-29192-12045-2322https://doaj.org/article/a670274d1d51492ba219084ae041fbca2018-07-01T00:00:00Zhttps://doi.org/10.1038/s41598-018-29192-1https://doaj.org/toc/2045-2322Abstract Directing and controlling flexural waves in thin plates along a curved trajectory over a broad frequency range is a significant challenge that has various applications in imaging, cloaking, wave focusing, and wireless power transfer circumventing obstacles. To date, all studies appeared controlling elastic waves in structures using periodic arrays of inclusions where these structures are narrowband either because scattering is efficient over a small frequency range, or the arrangements exploit Bragg scattering bandgaps, which themselves are narrowband. Here, we design and experimentally test a wave-bending structure in a thin plate by smoothly varying the plate’s rigidity (and thus its phase velocity). The proposed structures are (i) broadband, since the approach is frequency-independent and does not require bandgaps, and (ii) capable of bending elastic waves along convex trajectories with an arbitrary curvature.Amir DarabiAhmad ZareeiMohammad-Reza AlamMichael J. LeamyNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 8, Iss 1, Pp 1-7 (2018)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Amir Darabi Ahmad Zareei Mohammad-Reza Alam Michael J. Leamy Broadband Bending of Flexural Waves: Acoustic Shapes and Patterns
description	Abstract Directing and controlling flexural waves in thin plates along a curved trajectory over a broad frequency range is a significant challenge that has various applications in imaging, cloaking, wave focusing, and wireless power transfer circumventing obstacles. To date, all studies appeared controlling elastic waves in structures using periodic arrays of inclusions where these structures are narrowband either because scattering is efficient over a small frequency range, or the arrangements exploit Bragg scattering bandgaps, which themselves are narrowband. Here, we design and experimentally test a wave-bending structure in a thin plate by smoothly varying the plate’s rigidity (and thus its phase velocity). The proposed structures are (i) broadband, since the approach is frequency-independent and does not require bandgaps, and (ii) capable of bending elastic waves along convex trajectories with an arbitrary curvature.
format	article
author	Amir Darabi Ahmad Zareei Mohammad-Reza Alam Michael J. Leamy
author_facet	Amir Darabi Ahmad Zareei Mohammad-Reza Alam Michael J. Leamy
author_sort	Amir Darabi
title	Broadband Bending of Flexural Waves: Acoustic Shapes and Patterns
title_short	Broadband Bending of Flexural Waves: Acoustic Shapes and Patterns
title_full	Broadband Bending of Flexural Waves: Acoustic Shapes and Patterns
title_fullStr	Broadband Bending of Flexural Waves: Acoustic Shapes and Patterns
title_full_unstemmed	Broadband Bending of Flexural Waves: Acoustic Shapes and Patterns
title_sort	broadband bending of flexural waves: acoustic shapes and patterns
publisher	Nature Portfolio
publishDate	2018
url	https://doaj.org/article/a670274d1d51492ba219084ae041fbca
work_keys_str_mv	AT amirdarabi broadbandbendingofflexuralwavesacousticshapesandpatterns AT ahmadzareei broadbandbendingofflexuralwavesacousticshapesandpatterns AT mohammadrezaalam broadbandbendingofflexuralwavesacousticshapesandpatterns AT michaeljleamy broadbandbendingofflexuralwavesacousticshapesandpatterns
_version_	1718388269931036672

Broadband Bending of Flexural Waves: Acoustic Shapes and Patterns

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