$A graded negative refraction-index phononic crystals plate lens for focusing A0 mode Lamb wave and energy harvesting$
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A graded negative refraction-index phononic crystals plate lens for focusing A0 mode Lamb wave and energy harvesting

In this paper, a method of rotating scatterers was used to design a graded negative refraction index phononic crystal (GNRI PC) plate lens. The present plate lens contains the periodic perforated three-fan holes as the scatterers in the epoxy plate matrix. For a given rotation angle of the scatterer...

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Autores principales:	Fan Yang, Zhuhua Tan, Xu Han, Chongdu Cho
Formato:	article
Lenguaje:	EN
Publicado:	Elsevier 2021
Materias:	Phononic crystal plate Lens Rotating scatterers Negative refraction-index Lamb wave Focal length Physics QC1-999
Acceso en línea:	https://doaj.org/article/136bf3195e3e4889b2d11804289a6d1b
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spelling	oai:doaj.org-article:136bf3195e3e4889b2d11804289a6d1b2021-11-26T04:28:08ZA graded negative refraction-index phononic crystals plate lens for focusing A0 mode Lamb wave and energy harvesting2211-379710.1016/j.rinp.2021.105006https://doaj.org/article/136bf3195e3e4889b2d11804289a6d1b2021-12-01T00:00:00Zhttp://www.sciencedirect.com/science/article/pii/S221137972101007Xhttps://doaj.org/toc/2211-3797In this paper, a method of rotating scatterers was used to design a graded negative refraction index phononic crystal (GNRI PC) plate lens. The present plate lens contains the periodic perforated three-fan holes as the scatterers in the epoxy plate matrix. For a given rotation angle of the scatterer, the rotation would result in a variation of the second A0 band dispersion curve, which is related to a specific negative refraction index. Based on the Snell’s law, the negative refraction index was calculated by utilizing the equifrequency contour and wave vector space for the different rotation angle. Then, the graded negative refraction index plate lens was designed by the specific distribution of the rotation angle of the scatterer. The results show that the plate lens exhibits an obvious focus efficiency in the work frequency range from 16 kHz to 19 kHz. The influence of the work frequency and the dimension of the lens on the focal length was also discussed. Combining with the present plate lens, the energy harvesting analysis was performed numerically, and the energy harvesting efficiency with the plate lens is about 10.5 times larger than that without a lens. This work provides a new way to fabricate GNRI PC plate lens and energy harvesting devices.Fan YangZhuhua TanXu HanChongdu ChoElsevierarticlePhononic crystal plateLensRotating scatterersNegative refraction-indexLamb waveFocal lengthPhysicsQC1-999ENResults in Physics, Vol 31, Iss , Pp 105006- (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Phononic crystal plate Lens Rotating scatterers Negative refraction-index Lamb wave Focal length Physics QC1-999
spellingShingle	Phononic crystal plate Lens Rotating scatterers Negative refraction-index Lamb wave Focal length Physics QC1-999 Fan Yang Zhuhua Tan Xu Han Chongdu Cho A graded negative refraction-index phononic crystals plate lens for focusing A0 mode Lamb wave and energy harvesting
description	In this paper, a method of rotating scatterers was used to design a graded negative refraction index phononic crystal (GNRI PC) plate lens. The present plate lens contains the periodic perforated three-fan holes as the scatterers in the epoxy plate matrix. For a given rotation angle of the scatterer, the rotation would result in a variation of the second A0 band dispersion curve, which is related to a specific negative refraction index. Based on the Snell’s law, the negative refraction index was calculated by utilizing the equifrequency contour and wave vector space for the different rotation angle. Then, the graded negative refraction index plate lens was designed by the specific distribution of the rotation angle of the scatterer. The results show that the plate lens exhibits an obvious focus efficiency in the work frequency range from 16 kHz to 19 kHz. The influence of the work frequency and the dimension of the lens on the focal length was also discussed. Combining with the present plate lens, the energy harvesting analysis was performed numerically, and the energy harvesting efficiency with the plate lens is about 10.5 times larger than that without a lens. This work provides a new way to fabricate GNRI PC plate lens and energy harvesting devices.
format	article
author	Fan Yang Zhuhua Tan Xu Han Chongdu Cho
author_facet	Fan Yang Zhuhua Tan Xu Han Chongdu Cho
author_sort	Fan Yang
title	A graded negative refraction-index phononic crystals plate lens for focusing A0 mode Lamb wave and energy harvesting
title_short	A graded negative refraction-index phononic crystals plate lens for focusing A0 mode Lamb wave and energy harvesting
title_full	A graded negative refraction-index phononic crystals plate lens for focusing A0 mode Lamb wave and energy harvesting
title_fullStr	A graded negative refraction-index phononic crystals plate lens for focusing A0 mode Lamb wave and energy harvesting
title_full_unstemmed	A graded negative refraction-index phononic crystals plate lens for focusing A0 mode Lamb wave and energy harvesting
title_sort	graded negative refraction-index phononic crystals plate lens for focusing a0 mode lamb wave and energy harvesting
publisher	Elsevier
publishDate	2021
url	https://doaj.org/article/136bf3195e3e4889b2d11804289a6d1b
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A graded negative refraction-index phononic crystals plate lens for focusing A0 mode Lamb wave and energy harvesting

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