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Fundamental modes of new dispersive SH-waves in piezoelectromagnetic plate
Authors:A A ZAKHARENKO
Institution:1. International Institute of Zakharenko Waves (IIZWs), 660037, Krasnoyarsk-37, 17701, Krasnoyarsk, Russia
Abstract:Fundamental modes of new dispersive shear-horizontal (SH) acoustic waves propagating in the (6 mm) piezoelectromagnetic plate are studied. These SH-waves can propagate when the following boundary conditions are exploited for both the upper and lower surfaces of the plate: (1) when the surfaces are mechanically free, electrically and magnetically closed and (2) when the surfaces are mechanically free, electrically and magnetically open. The SH-waves depend on the electromagnetic wave speed $V_{\rm EM} =1/ {\sqrt {(\varepsilon\mu)}}$ and can only exist when the electromagnetic constant $\alpha \ne 0$ . The calculations (first evidence) were performed for the PZT-5H–Terfenol-D which is a composite with a large value of α. The limit cases of large values of α (α 2?=?0.5εμ, α 2?=?0.9εμ, and α 2?=?0.99εμ) are studied because they satisfy the limitation condition of α 2?<?εμ.
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