Plane strain wave in an isotropic layer of a viscoelastic material |
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Authors: | V M Kulik |
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Institution: | (1) Kutateladze Institute of Thermophysics, Siberian Division, Russian Academy of Sciences, Novosibirsk, 630090 |
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Abstract: | The velocity and the rate of decay of a strain wave in a layer of a viscoelastic material rigidly fixed on a solid foundation
are determined. The wave structure (ratio of the longitudinal to the transverse displacement) and the profiles of these displacements
are analyzed. Attenuation of waves in the first mode is found to be more significant than that in an infinite space. The most
intense decay is observed at resonance frequencies. A strong effect of compressibility of the medium on wave parameters is
revealed. Conditions at which such a system operates as a waveguide are found. For a loss tangent higher than 0.13 (for an
incompressible medium), the character of the dispersion dependence is observed to change drastically: the wave velocity decreases
with decreasing frequency.
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Translated from Prikladnaya Mekhanika i Tekhnicheskaya Fizika, Vol. 47, No. 3, pp. 104–111, May–June, 2006. |
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Keywords: | viscoelastic material wave velocity decay profile longitudinal and transverse displacements |
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