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Deviation of a monochromatic Lamb wave beam in anisotropic multilayered media: asymptotic analysis, numerical and experimental results

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5 Author(s)
Potel, Catherine ; Lab. d''Acoustique de l''Universite du Maine, Maine Univ., Le Mans, France ; Baly, S. ; de Belleval, Jean‐Francois ; Lowe, M.
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The aim of this paper is threefold: to describe the physical phenomenon of the excitation of modal waves such as Lamb waves, in anisotropic multilayered media, by a monochromatic incident beam, using an asymptotic approach; to present a three-dimensional model using the decomposition of the incident beam into monochromatic plane waves (the formalism is applied to the particle displacement vector); to illustrate the phenomenon both numerically and experimentally. Numerical and experimental maps of the reflected field of pressure are presented, and the reradiation of the Lamb wave beam in an oblique plane is theoretically and numerically illustrated.

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Ultrasonics, Ferroelectrics, and Frequency Control, IEEE Transactions on  (Volume:52 ,  Issue: 6 )