Analytical solution for shear horizontal wave propagation in piezoelectric coupled media by interdigital transducer

    Authors

    Q. Wang; S. T. Quek;V. K. Varadan

    Comments

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    Abbreviated Journal Title

    J. Appl. Mech.-Trans. ASME

    Keywords

    SURFACE WAVES; EXCITATION; SCATTERING; PLATES; Mechanics

    Abstract

    An analytical solution for the shear horizontal wave propagation excited by interdigital transducer in a piezoelectric coupled semi-infinite medium is developed. This solution is an ex I tension of earlier work on wave propagation in a piezoelectric coupled plate with finitely long interdigital transducer by fully taking account of piezoelectric effects in analysis. In the current analysis, the mathematical model for a semi-infinite metal substrate bonded by a layer of interdigital transducer with infinite length is first derived. The theoretical solutions are obtained in terms of elliptic integration of the first kind and of the standard integral representation for Legendre polynomial. The essential hypothesis for the derivation of the analysis is investigated. Based on the solution for infinitely long interdigital transducer an analytical solution for the wave propagation in this semi-infinite piezoelectric medium excited by a finitely long interdigital transducer is obtained through Fourier transform. This theoretical research can be applied to health monitoring of structures by interdigital transducer It could also be used as a framework for the design of interdigital transducer in wave excitation of smart structures.

    Journal Title

    Journal of Applied Mechanics-Transactions of the Asme

    Volume

    72

    Issue/Number

    3

    Publication Date

    1-1-2005

    Document Type

    Article

    Language

    English

    First Page

    341

    Last Page

    350

    WOS Identifier

    WOS:000229491000004

    ISSN

    0021-8936

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