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Título : Multifrequency piezoelectric composites: one-dimensional modeling
Autor : Sánchez, S.; Montero de Espinosa Freijo, Francisco; Lamberti, N.
Palabras clave : Piezoelectric composites
Ultrasonic Transducers
Fecha de publicación : feb-1999
Editor: Elsevier
Citación : Ultrasonics 37(2): 97-105 (1999)
Resumen: It has been proposed that multifrequency piezoelectric composites increase the bandwidth of the standard piezocomposite configurations. The geometrical approach consists of the use of piezoelectric elements with different width-to-thickness ratios in the same polymer matrix. A one-dimensional modeling of these new structures can be made, performing an homogenization of the overall composite parameters by linking Onoe's coupling mode theory with standard one-dimensional composite models. A strong approximation must be introduced to define a 'virtual' c13 elastic constant. The model accurately predicts the transducer behaviour of 2–2 standard piezocomposites with piezoceramic elements having a width-to-thickness ratio w:t between 0 and 0.8. In the case of double composites, the coupling between the different resonators, explained by a physical model, is made empirically introducing a mutual induction coefficient between the inductances of their respective equivalent circuits. The computed and experimental results show the usefulness of the double design.
Descripción : Final full-text version of the paper available at: http://www.sciencedirect.com/science/journal/0041624X.
Versión del editor: http://dx.doi.org/10.1016/S0041-624X(98)00048-1
URI : http://hdl.handle.net/10261/6173
DOI: 10.1016/S0041-624X(98)00048-1
ISSN: 0041-624X
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