2024-03-29T10:05:11Zhttp://digital.csic.es/dspace-oai/requestoai:digital.csic.es:10261/399342017-03-06T09:22:27Zcom_10261_89com_10261_3col_10261_342
Shear resonance mode decoupling to determine the characteristic matrix of piezoceramics for 3-D modelling
Pardo, Lorena
García, Álvaro
Montero de Espinosa Freijo, Francisco
Brebøl, Klaus
Piezocerámica
Piezoceramics
Caracterizatión
Characterization
Resonancia
Resonance
Cizallas
Shear
Modelización
Modeling
Titanatos
Titanates
The determination of the characteristic frequencies of an electromechanical resonance is not enough data to obtain material properties of piezoceramics, including all losses, from complex impedance measurements. Besides, values of impedance around resonance and antiresonance frequencies are also required to determine 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 by Alemany et al. software. A soft commercial PZT ceramic was used in this study and a number of 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 modelling of piezoceramics is assessed by means of Finite Element Analysis (FEA), which shows that uncoupled resonances are virtually pure thickness driven shear modes.
CSIC project #201060E069 and European Network of Excellence (NoE-MIND CE FP6 515757-2)
Peer reviewed
2011-09-23T13:49:38Z
2011-09-23T13:49:38Z
2011-03
artículo
http://purl.org/coar/resource_type/c_6501
IEEE Transactions on Ultrasonics Ferroelectrics and Frequency Control
0885-3010
http://hdl.handle.net/10261/39934
en
http://ieeexplore.ieee.org/xpls/abs_all.jsp?arnumber=5733267
open