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An overview is given of the results of recent and new studies by the authors of this work on topics related to backward acoustic waves of pure-shear type and Lamb type in piezoelectric, crystal, and isotropic plates with free and liquid-loaded surfaces. Various physical mechanisms giving rise to such waves are revealed and quantitatively described by the use of asymptotic expansion of the secular...
The basic characteristics of leaky backward Lamb waves are investigated theoretically and numerically in various combinations of isotropic (aluminum, steel) and anisotropic (YX-NBBT95/5, YX-LiNbO3) plates and surrounding liquids (water, petrol, liquid helium). The phase velocity and attenuation, the group and energy flux velocities, the energies and energy fluxes are among the studied characteristics...
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