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Piezoelectric ceramic disks with thickness-graded material properties
Conference proceeding

Piezoelectric ceramic disks with thickness-graded material properties

P.C.Y Lee, J.D Yu, X Li, W.-H Shih and IEEE
Proceedings of International Frequency Control Symposium, pp 769-777
1997

Abstract

Ceramics Closed-form solution Crystalline materials Equations Frequency measurement Material properties Piezoelectric materials Piezoelectricity Resonance Resonant frequency
A system of two-dimensional first-order equations for electroded piezoelectric crystal plates with general symmetry and thickness-graded material properties was recently deduced from the three-dimensional equations of linear piezoelectricity. These equations are much simplified for the two limiting cases of thickness-graded piezoelectric properties, i.e., the homogeneous plate and bimorph of piezoelectric ceramics. Closed form solutions are obtained from these reduced equations for the flexural and thickness-shear vibrations and static response of bimorph disks as well as for the extensional and thickness-stretch vibrations of homogeneous disks. Frequency spectra and modes are computed and examined. Resonance frequencies for both homogeneous and bimorph disks of PZT-857 are computed and measured. The comparison of the results shows that the agreement is close.

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Engineering, Electrical & Electronic
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