Waves in rotating conducting piezoelectric media

The propagation of waves in a conducting piezoelectric solid is studied for the case when the entire medium rotates with a uniform angular velocity. For comparison, both the conventional electrically quasistatic theory and the fully dynamic Maxwell equations are taken into consideration. In completion, a generalized thermoelastic theory of piezoelectric bodies is incorporated. The governing dispersion relations are obtained to determine the effects of moderate rotation, thermal, and constant electrical conductivity on the finite phase velocity of the waves. Analysis is carried out for plane waves in an infinite medium but also for surface waves of a half-space. Finally, the radial vibrations of a hollow cylinder are addressed. The evaluations are specified for hexagonal crystals of (6 mm) class and a simple arrangement of the direction of wave propagation and the crystal and rotational axes.