Generalized homogenization model of piezoelectric materials for ultrasonic transducer applications
| Autor: | Fidéle Léopold Hanse Wampo, Richard Ntenga, Joseph Yves Effa, Yuri Lapusta, Guy Edgar Ntamack, Pierre Maréchal |
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| Přispěvatelé: | Groupe de Mécanique des Matériaux et l’Acoustique (GMMA), Université de Ngaoundéré/University of Ngaoundéré [Cameroun] (UN), Département de Physique [Univ Ngaoundéré] (UN-FS), Faculté de Sciences [Univ Ngaoundéré] (UN-FS), Université de Ngaoundéré/University of Ngaoundéré [Cameroun] (UN)-Université de Ngaoundéré/University of Ngaoundéré [Cameroun] (UN), Laboratoire d’Analyses Simulations et Essais (LASE), Institut Pascal (IP), Centre National de la Recherche Scientifique (CNRS)-Université Clermont Auvergne (UCA)-Institut national polytechnique Clermont Auvergne (INP Clermont Auvergne), Université Clermont Auvergne (UCA)-Université Clermont Auvergne (UCA), Laboratoire Ondes et Milieux Complexes (LOMC), Université Le Havre Normandie (ULH), Normandie Université (NU)-Normandie Université (NU)-Centre National de la Recherche Scientifique (CNRS) |
| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
[PHYS.MECA.MEMA]Physics [physics]/Mechanics [physics]/Mechanics of materials [physics.class-ph]
Mechanics of Materials Mechanical Engineering Piezoelectric materials Materials Chemistry Ceramics and Composites material connectivity generalized homogenization models ultrasonic transducers [PHYS.MECA.ACOU]Physics [physics]/Mechanics [physics]/Acoustics [physics.class-ph] |
| Zdroj: | Journal of Composite Materials Journal of Composite Materials, 2021, 56, pp.713-726. ⟨10.1177/00219983211058806⟩ |
| ISSN: | 0021-9983 |
| DOI: | 10.1177/00219983211058806⟩ |
| Popis: | International audience; Although piezocomposite (PC) materials have increasingly attracted researchers, there is still a need to properly and easily derive their properties. We develop a generalized homogenization model (GHM) that accounts for Smith and Cha approaches to evaluate the equivalent characteristics of piezocomposites. This method could be applied to all connectivities patterns, but restricted herein to 2-2 and 1-3 piezocomposites for comparison with Smith (1-3) and Cha (2-2) analytical results. In the proposed GHM is a parameter θ, is changed for various connectivities. The 1-3 and 2-2 PZT-7A/Araldite D (PCs) data are used and equivalent characteristics of these Pcs are determined as function of volume fraction of PZT-7A piezoelectric. Results show that the electromechanical coefficients are well fitted by Voigt and Reuss models. Results obtained for some parameters show that the proposed GHM is consistent with the analytical existing models used for the 1-3 and 2-2 connectivities and is in line with measured values from Chan and Unsworth (1989). Based on the GHM 2-2 configuration results of piezocomposite materials, the electroacoustic responses of transducers having some of these properties are simulated using the KLM model. A performance trade-off was chosen, resulting in an improved thickness coupling coefficient and a lowered acoustical impedance, and a similar approach as that on a pure PZT-7A. |
| Databáze: | OpenAIRE |
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