Abstract
The propagation of Love waves in a piezoelectric lamina bonded ontoa semi-infinite solid medium is investigated in this paper. The dispersivecharacteristics and the mode shapes of the deflection and the electricpotential in the thickness direction of the piezoelectric layer aretheoretically derived. Numerical simulations show that the phase velocitiesinitiate at the shear wave velocity of the host medium and tend towards theBleustein-Gulyayev surface wave velocity for the piezoelectric layer at highwavenumbers for the first mode. The first two mode shapes of the electricpotential correspond to a half-cosine and a full-cycle sinusoidaldistribution, respectively, and become distorted as the wavenumber increases.These findings are significant in the application of inter-digital transducersfor surface wave excitation in structural health monitoring.
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