Publication | Open Access
Characteristics of Wave Propagation in Functionally Gradient Piezoelectric Material Plates and its Response Analysis. Part 2: Calculation Results.
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References
1991
Year
EngineeringAcoustic MetamaterialMechanical EngineeringResponse AnalysisVibrationsHomogeneous PlateComputational ElectromagneticsPiezoelectric MaterialMaterials ScienceStress WaveElectrical EngineeringGradient Piezoelectric MaterialWave PropagationCalculation ResultsPiezoelectric MaterialsPiezoelectricityUltrasoundPiezoelectric NanogeneratorsWave Propagation AnalysisStructural MechanicsVibration ControlMechanics Of Materials
The numerical methods presented in the previous paper for the wave propagation analysis of anisotropic functionally gradient piezoelectric material (FGPM) plates are applied to a hypothetical FGPM plate. The frequency spectum, energy velocities, electromechanical coupling constants, and the mode shapes of the waves in the FGPM plate are obtained. The transient responses of the FGPM plate excited by a line time-step impact load, a line electrode, and interdigital electrodes are computed. The results obtained for the FGPM plate and a homogenous z-x LiTaO3 plate are compared. It is found that the displacements are much more concentrated on the softer surface of the FGPM plate than on the surfaces of the homogeneous plate, and that the displacement responses corresponding to the surface waves of the FGPM plate are larger than those of the homogeneous plate. A pseudo-SH surface wave whose penetration depth is as small as that of the Rayleigh wave is discovered.