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contributor authorLiu, Feng
contributor authorYang, Zhichun
contributor authorShi, Pengtao
contributor authorShen, Yizhou
contributor authorCao, Liyun
contributor authorXu, Yanlong
date accessioned2022-05-08T09:27:46Z
date available2022-05-08T09:27:46Z
date copyright12/21/2021 12:00:00 AM
date issued2021
identifier issn0021-8936
identifier otherjam_89_4_041003.pdf
identifier urihttp://yetl.yabesh.ir/yetl1/handle/yetl/4285165
description abstractGreat progress has been made in modulating flexural waves by elastic metasurfaces. Most of the proposed elastic metasurfaces suffer from chromatic aberration, limited in a narrow bandwidth around the designed frequency. In this paper, overcoming the chromatic aberration, an ultra-broadband achromatic meta-slab (UAM) with subunits of gradient thickness is proposed to realize the refraction angle unchanged with the incident frequency. Based on the phase compensation principle, wavelength-dependent phase shifts for the UAM that realize achromaticity are obtained. In order to verify the effectiveness of the theoretical design, the transmitted wavefields are solved according to the phased array theory, and the results correspond with those obtained by the finite element (FE) simulations and experiments, which show that the refraction angle is unchanged for incident frequencies from 2 kHz to 8 kHz. Besides, the UAM is extended into a periodic meta-slab, and multifrequency achromaticity is realized. Our designed meta-slabs overcome the chromatic aberration by simple configurations, which have significance in the applications of vibration control, vibrational energy harvesting, and health monitoring.
publisherThe American Society of Mechanical Engineers (ASME)
titleRefraction of Flexural Waves by Ultra-Broadband Achromatic Meta-Slab With Wavelength-Dependent Phase Shifts
typeJournal Paper
journal volume89
journal issue4
journal titleJournal of Applied Mechanics
identifier doi10.1115/1.4053201
journal fristpage41003-1
journal lastpage41003-10
page10
treeJournal of Applied Mechanics:;2021:;volume( 089 ):;issue: 004
contenttypeFulltext


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