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Directional ultrasound source for solid materials inspection: diffraction management in a metallic phononic crystal

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10.3390/s20216148
 
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hdl:2117/331203

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Mohamed Selim, Hossameldin
Pico Vila, Rubén
Trull Silvestre, José FranciscoMés informacióMés informacióMés informació
Delgado Prieto, MiquelMés informacióMés informacióMés informació
Cojocaru, CrinaMés informacióMés informacióMés informació
Document typeArticle
Defense date2020-10-29
PublisherMultidisciplinary Digital Publishing Institute (MDPI)
Rights accessOpen Access
Attribution-NonCommercial-NoDerivs 3.0 Spain
This work is protected by the corresponding intellectual and industrial property rights. Except where otherwise noted, its contents are licensed under a Creative Commons license : Attribution-NonCommercial-NoDerivs 3.0 Spain
Abstract
In this work, we numerically investigate the diffraction management of longitudinal elastic waves propagating in a two-dimensional metallic phononic crystal. We demonstrate that this structure acts as an “ultrasonic lens”, providing self-collimation or focusing effect at a certain distance from the crystal output. We implement this directional propagation in the design of a coupling device capable to control the directivity or focusing of ultrasonic waves propagation inside a target object. These effects are robust over a broad frequency band and are preserved in the propagation through a coupling gel between the “ultrasonic lens” and the solid target. These results may find interesting industrial and medical applications, where the localization of the ultrasonic waves may be required at certain positions embedded in the object under study. An application example for non-destructive testing with improved results, after using the ultrasonic lens, is discussed as a proof of concept for the novelty and applicability of our numerical simulation study.
CitationMohamed Selim, H. [et al.]. Directional ultrasound source for solid materials inspection: diffraction management in a metallic phononic crystal. "Sensors", 29 Octubre 2020, vol. 20, núm. 21, p. 6148:1-6148:18. 
URIhttp://hdl.handle.net/2117/331203
DOI10.3390/s20216148
ISSN1424-8220
Publisher versionhttps://www.mdpi.com/1424-8220/20/21/6148
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