Piezo thermoelastic model for design optimization of resonant beams

Author

Vigevani, Gabriele ; Kuypers, Jan ; Pisano, A.P.

Author_Institution

Mech. Eng., Univ. of California at Berkeley, Berkeley, CA

fYear

2008

fDate

2-5 Nov. 2008

Firstpage

1536

Lastpage

1539

Abstract

In this study we present an analytical model to characterize the thermo elastic damping (TED) for beams in piezoelectric and pyroelectric materials for Q optimization. The model is based on the Euler Bernoulli equation and considers the constitutive equations for piezoelectric and pyroelectric materials. The analytical solution shows that due to the piezoelectric stiffening and the pyroelectric effect the Q-factor is penalized by 15%. The optimization of the Q-factor for piezoelectric beam based resonators is not only related to the beam dimensions, as for isotropic materials, but also to the electrode design.

Keywords

Q-factor; crystal resonators; optimisation; pyroelectric devices; thermoelasticity; vibrations; Euler Bernoulli equation; Q optimization; design optimization; piezothermoelastic model; resonant beams; thermo elastic damping; Analytical models; Damping; Design optimization; Electrodes; Equations; Piezoelectric materials; Pyroelectricity; Q factor; Resonance; Thermoelasticity; Aluminum Nitride; Thermo Elastic Damping; piezoelectric beam resonators;

fLanguage

English

Publisher

ieee

Conference_Titel

Ultrasonics Symposium, 2008. IUS 2008. IEEE

Conference_Location

Beijing

Print_ISBN

978-1-4244-2428-3

Electronic_ISBN

978-1-4244-2480-1

Type

conf

DOI

10.1109/ULTSYM.2008.0374

Filename

4803237