Two-dimensional problems of electroacoustics in homogeneous piezoelectric crystals

Formation of a hybrid of electroacoustic waves in piezoelectric layered composites

“…The space consists of two transversely isotropic piezoelectric half-spaces Ω 1 (x, y, z) and Ω 2 (x, y, z) of the 6mm class and 6m2 class of hexagonal symmetry respectively, which are in non-acoustic contact. The crystallographic sections and orientations of the crystallographic axes of these materials are compared with the Cartesian coordinate system 0xyz so that in the coordinate plane x0y of neighboring half-spaces Ω 1 (x, y, z) and Ω 2 (x, y, z) there are separated electroactive waves of antiplane and plane deformations, respectively [7]. The axis 0y is directed vertically upwards.…”

“…The non-zero components of the tensor of mechanical stresses and the electric displacement vector on the coordinate plane x0y in the case of the plane stress-strain state for the piezoelectric crystals of the 6m2 class, are represented in the form [7] σ (2) xx (x, y, t) = c…”

“…(2) z (x, y, t) ≡ 0 in the formulation of two-dimensional problem of electro elasticity [7], the quasistatic equations of the electroactive plane stress-strain state, with respect to elastic displacements u 2 (x, y, t), v 2 (x, y, t) and the potential of the electric field ϕ 2 (x, y, t) are written in the form (c…”

“…It was shown in [7] that, depending on the crystallographic symmetry of piezoelectrics in their sagittal planes, it is possible to excite two-component electroactive shear waves, or three-component electroactive plane deformation waves separated from each other. When an electroacoustic wave of one of these types propagates in the layered piezoelectric composite, with the non-acoustic contact between adjacent layers, part of the wave energy through the accompanying oscillations of the electric field seep into the adjacent layer, exciting an electroacoustic wave of another type in it.…”

Multi-Component Electroacoustic Waves (Mceaw) In Piezo Crystalline Textures: Applied Opportunities

“…The possibility of the separate excitation and propagation of an electroactive elastic plane deformation wave from thenon-electroactive shear elastic wave or separate excitation and propagation of an electroactive shear elastic wave from a non electroactive elastic plane deformation wave, depending on the physical properties of the piezoelectric medium, was studied in the articles [2,3]. However, the other new cases when separate excitation and propagation of two electroactive wave packets are possiblehave not been considered yet.…”