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The response of rectangular piezoelectric sensors to Rayleigh and Lamb ultrasonic waves
Journal article   Open access   Peer reviewed

The response of rectangular piezoelectric sensors to Rayleigh and Lamb ultrasonic waves

Francesco Lanza di Scalea, Howard Matt and Ivan Bartoli
The Journal of the Acoustical Society of America, v 121(1), pp 175-187
2007
url
https://doi.org/10.1016/j.psym.2012.10.003View
Published, Version of Record (VoR)Maybe Open Access (Publisher Bronze) Open
url
https://doi.org/10.1121/1.2400668View
Published, Version of Record (VoR) Open

Abstract

A fundamental understanding of the response of piezoelectric transducer patches to ultrasonic waves is of increasing interest to the field of structural health monitoring. While analytical solutions exist on the interaction of a piezoelectric actuator with the generated Lamb waves, the behavior of a piezoelectric sensor has only been examined for the limited case of a piezo-actuated Lamb wave in a pitch-catch configuration. This paper focuses on the fundamental response of surface-bonded piezoelectric sensors to ultrasonic waves. The response to both Rayleigh waves and Lamb waves is examined, starting with harmonic excitation fields and moving to broadband and narrowband excitation fields. General oblique incidence of the wave on rectangular sensors is treated first; parallel incidence is then derived as a particular case. The solutions are developed analytically for the harmonic and the narrowband excitations, and semianalytically for the broadband excitation. The results obtained can be used to design ultrasonic sensors that are either particularly sensitive to a given mode or possess unique directivity behavior which, in turn, can greatly simplify current algorithms for damage detection and localization.

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Web of Science research areas
Acoustics
Audiology & Speech-language Pathology
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