Shear resonance mode decoupling to determine the characteristic matrix of piezoceramics for 3-D modeling

The determination of the characteristic frequencies of an electromechanical resonance does not provide enough data to obtain the material properties of piezoceramics, including all losses, from complex impedance measurements. Values of impedance around resonance and antiresonance frequencies are als...

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Détails bibliographiques
Publié dans:IEEE transactions on ultrasonics, ferroelectrics, and frequency control. - 1986. - 58(2011), 3 vom: 22. März, Seite 646-57
Auteur principal: Pardo, Lorena (Auteur)
Autres auteurs: García, Alvaro, de Espinosa, Francisco Montero, Brebøl, Klaus
Format: Article en ligne
Langue:English
Publié: 2011
Accès à la collection:IEEE transactions on ultrasonics, ferroelectrics, and frequency control
Sujets:Journal Article Research Support, Non-U.S. Gov't
Description
Résumé:The determination of the characteristic frequencies of an electromechanical resonance does not provide enough data to obtain the material properties of piezoceramics, including all losses, from complex impedance measurements. Values of impedance around resonance and antiresonance frequencies are also required to calculate the material losses. Uncoupled resonances are needed for this purpose. The shear plates used for the material characterization present unavoidable mode coupling of the shear mode and other modes of the plate. A study of the evolution of the complex material coefficients as the coupling of modes evolves with the change in the aspect ratio (lateral dimension/thickness) of the plate is presented here. These are obtained using software. A soft commercial PZT ceramic was used in this study and several shear plates amenable to material characterization were obtained in the range of aspect ratios below 15. The validity of the material properties for 3-D modeling of piezoceramics is assessed by means of finite element analysis, which shows that uncoupled resonances are virtually pure thickness-driven shear modes
Description:Date Completed 29.06.2011
Date Revised 24.03.2011
published: Print
Citation Status PubMed-not-MEDLINE
ISSN:1525-8955
DOI:10.1109/TUFFC.2011.1848