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

Journal Article · · Journal of Applied Physics
DOI:https://doi.org/10.1063/1.4999627· OSTI ID:1511157

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.

Research Organization:
Univ. of Mississippi, Oxford, MS (United States)
Sponsoring Organization:
USDOE
Grant/Contract Number:
NE0008400; NE 0008400
OSTI ID:
1511157
Alternate ID(s):
OSTI ID: 1413565
Journal Information:
Journal of Applied Physics, Vol. 122, Issue 23; ISSN 0021-8979
Publisher:
American Institute of Physics (AIP)Copyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 17 works
Citation information provided by
Web of Science

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Figures / Tables (7)


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