Effect of the parameters of a material on the surface displacements caused by waves propagating in a layer
Source abstract
Abstract
The amplitude—frequency characteristics of the vibrations of the surface of a free elastic layer are determined. These vibrations are caused by propagating Lamb waves under the action of a normal surface load. The changes in the spectra of surface displacements and in the tangential-to-normal displacement-amplitude ratios during changes in the Poisson ratio are studied. Studying the spectrum of surface displacements of an elastic layer is of interest owing to the necessity of discriminating modal components of the wave field [1] and as one of possible methods for determining some of the parameters of a material. The ratio of the amplitudes of the horizontal and vertical displacements as a function of the frequency of a vibration source is sensitive to the Poisson ratio of the material and the conditions of the contact with the base. The amplitude-frequency characteristics of the surface displacements of an elastic isotropic layer are plotted and compared to those obtained in the case of a layer that is in contact with a rigid base.
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Research context
OpenAlex topics: Mechanical and Thermal Properties Analysis · Engineering Technology and Methodologies
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References (5)
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2. Viktorov, I.A., Fizicheskie osnovy primeneniya ul’trazvukovykh voln Releya i Lemba v tekhnike (Physical Grounds of the Use of Ultrasonic Rayleigh and Lamb Waves in Engineering), Moscow: Nauka, 1966.
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4. Kharitonov, A.V., Excitation of Oscillations of an Elastic Isotropic Plate by a System of Volume and Surface Forces, Akust. Zh., 1978, vol. 24, no. 4, pp. 602–610.
5. Grinchenko, V.T. and Meleshko, V.V., Garmonicheskie kolebaniya i volny v uprugikh telakh (Harmonic Oscillations and Waves in Elastic Bodies), Kiev: Naukova Dumka, 1981.