Wave boundary element to study Lamb wave propagation in plates

    Authors

    J. Jin; S. T. Quek;Q. Wang

    Comments

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    Abbreviated Journal Title

    J. Sound Vibr.

    Keywords

    FREQUENCY REFLECTION CHARACTERISTICS; RECTANGULAR NOTCH; SCATTERING; Acoustics; Engineering, Mechanical; Mechanics

    Abstract

    By using analytical mode shapes as the interpolating functions for both displacements and stresses on the reference edges of a plate, a wave element is formulated for use in the boundary element method to study Lamb wave propagation and interaction in plates, to achieve both accuracy and computational efficiency. Lamb wave interaction with a notch is investigated using this method. The results with respect to wave transmission, reflection and mode conversion are consistent with physical considerations of Lamb mode shape and energy conservation. It is shown through the reflection coefficients that So Lamb wave is more sensitive than A(0) wave for detecting a shallow notch in a plate. These coefficients can be used to aid the characterization of the presence of a notch and contribute to quantitative non-destructive evaluation methodology for plate structures. Time history results are obtained by conducting Fourier transform on the coefficients solved in frequency domain. Comparison with experiment results shows the suitability of the method for wave propagation studies in relation to damage detection. (c) 2005 Elsevier Ltd. All rights reserved.

    Journal Title

    Journal of Sound and Vibration

    Volume

    288

    Issue/Number

    1-2

    Publication Date

    1-1-2005

    Document Type

    Article

    Language

    English

    First Page

    195

    Last Page

    213

    WOS Identifier

    WOS:000232227400010

    ISSN

    0022-460X

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