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Title: Wavefront modulation and controlling for Lamb waves using surface bonded slice lenses

Abstract

We present that there is a growing interest in controlling the propagation of Lamb waves to achieve better performance for structural health monitoring and nondestructive evaluation. In this study, we present new methods of controlling Lamb waves using simple slice lenses through wavefront modulation. The lenses are made of metal slices with designed shapes. Once bonded on plates, the lenses modify the effective plate thickness, and therefore change the Lamb wave characteristics such as the wavenumber and phase velocity, providing convenient ways of modulating wavefront and controlling Lamb waves in plates. Numerically and experimentally, we demonstrated that a straight wavefront A 0 mode can be focused on the desired focal point using a plano-concave aspherical lens. We also demonstrated that the A 0 mode can be steered with different frequency components steered to different directions using a simple prism made of metal slices. The work shows that such simple slice lenses provide easy ways for controlling Lamb waves, and have a great potential for Lamb wave based applications.

Authors:
ORCiD logo [1];  [2]
  1. Duke Univ., Durham, NC (United States)
  2. Univ. of South Carolina, Columbia, SC (United States)
Publication Date:
Research Org.:
Univ. of Mississippi, Oxford, MS (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1511157
Alternate Identifier(s):
OSTI ID: 1413565
Grant/Contract Number:  
NE0008400; NE 0008400
Resource Type:
Journal Article: Accepted Manuscript
Journal Name:
Journal of Applied Physics
Additional Journal Information:
Journal Volume: 122; Journal Issue: 23; Journal ID: ISSN 0021-8979
Publisher:
American Institute of Physics (AIP)
Country of Publication:
United States
Language:
English
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; 42 ENGINEERING

Citation Formats

Tian, Zhenhua, and Yu, Lingyu. Wavefront modulation and controlling for Lamb waves using surface bonded slice lenses. United States: N. p., 2017. Web. doi:10.1063/1.4999627.
Tian, Zhenhua, & Yu, Lingyu. Wavefront modulation and controlling for Lamb waves using surface bonded slice lenses. United States. doi:10.1063/1.4999627.
Tian, Zhenhua, and Yu, Lingyu. Fri . "Wavefront modulation and controlling for Lamb waves using surface bonded slice lenses". United States. doi:10.1063/1.4999627. https://www.osti.gov/servlets/purl/1511157.
@article{osti_1511157,
title = {Wavefront modulation and controlling for Lamb waves using surface bonded slice lenses},
author = {Tian, Zhenhua and Yu, Lingyu},
abstractNote = {We present that there is a growing interest in controlling the propagation of Lamb waves to achieve better performance for structural health monitoring and nondestructive evaluation. In this study, we present new methods of controlling Lamb waves using simple slice lenses through wavefront modulation. The lenses are made of metal slices with designed shapes. Once bonded on plates, the lenses modify the effective plate thickness, and therefore change the Lamb wave characteristics such as the wavenumber and phase velocity, providing convenient ways of modulating wavefront and controlling Lamb waves in plates. Numerically and experimentally, we demonstrated that a straight wavefront A0 mode can be focused on the desired focal point using a plano-concave aspherical lens. We also demonstrated that the A0 mode can be steered with different frequency components steered to different directions using a simple prism made of metal slices. The work shows that such simple slice lenses provide easy ways for controlling Lamb waves, and have a great potential for Lamb wave based applications.},
doi = {10.1063/1.4999627},
journal = {Journal of Applied Physics},
issn = {0021-8979},
number = 23,
volume = 122,
place = {United States},
year = {2017},
month = {12}
}

Journal Article:
Free Publicly Available Full Text
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Cited by: 1 work
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Works referenced in this record:

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