Lamb wave propagation characteristics in a piezoelectric ceramic plate with spatially varying thickness

Author

Motegi, Kazuhiro ; Toda, Keisuke

Author_Institution

Dept. of Electron. Eng., Nat. Defense Acad., Yokosuka, Japan

Volume

1

fYear

1999

fDate

17-20 Oct. 1999

Firstpage

573

Abstract

Basic studies on Lamb wave propagation in a piezoelectric ceramic plate, whose thickness varies linearly with distance, is presented. The gradient of the plate surface is taken into account in the calculation model. Phase velocities of 6 lowest-order Lamb wave modes are represented as a function of the product of frequency and plate thickness for various ratios between the thickness change and the propagation distance. The velocity dispersion curves are intermittent when the gradient is not zero. A device is fabricated using a piezoelectric ceramic plate, to experimentally demonstrate the Lamb wave propagation in the inhomogeneous plate.

Keywords

acoustic wave propagation; ceramics; piezoelectricity; surface acoustic waves; Lamb wave propagation characteristics; piezoelectric ceramic plate; plate surface gradient; propagation distance; spatially varying thickness; thickness change; velocity dispersion curves; Boundary conditions; Ceramics; Nonhomogeneous media; Partial differential equations; Piezoelectric transducers; Radio frequency; Tensile stress;

fLanguage

English

Publisher

ieee

Conference_Titel

Ultrasonics Symposium, 1999. Proceedings. 1999 IEEE

Conference_Location

Caesars Tahoe, NV

ISSN

1051-0117

Print_ISBN

0-7803-5722-1

Type

conf

DOI

10.1109/ULTSYM.1999.849464

Filename

849464