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Akademický článek

Mapped orthogonal functions method applied to acoustic waves-based devices

Autor: J. E. Lefebvre, J. G. Yu, F. E. Ratolojanahary, L. Elmaimouni, W. J. Xu, T. Gryba

Publikováno v: AIP Advances, Vol 6, Iss 6, Pp 065307-065307-18 (2016)

This work presents the modelling of acoustic wave-based devices of various geometries through a mapped orthogonal functions method. A specificity of the method, namely the automatic incorporation of boundary conditions into equations of motion throug

Externí odkaz: https://doaj.org/article/38fad318e4e343bca849060d7e8acbad

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Modeling of Rosen-type piezoelectric transformer by mean of a polynomial approach

Autor: D. J. Falimiaramanana, P. M. Rabotovao, M. Rguiti, I. Naciri, L. Elmaimouni, J. E. Lefebvre, F. E. Ratolojanahary, T. Gryba

Publikováno v: 6th International Conference on Multimedia Computing and Systems (ICMCS 2018)
6th International Conference on Multimedia Computing and Systems (ICMCS 2018), May 2018, Rabat, Morocco. pp.143-148, ⟨10.1109/ICMCS.2018.8525914⟩
ICMCS

International audience; The electromechanical behavior of piezoelectric transformers (PTs) is predicted using a polynomial approach. It is the first time that a polynomial method is applied to study structures made up of both an actuator and a transd

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::4fb8958ae068d4ab6bb30e039c69d9be
https://uphf.hal.science/hal-03582336

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Modeling of a Circular Ring MEMS Resonator with Voltage Excitation by Means of an Orthogonal Polynomial Method

Autor: J.E. Lefebvre, L. Elmaimouni, I. Naciri, A. Rguiti, T. Gryba, F. E. Ratolojanahary

Publikováno v: Acta Acustica united with Acustica
Acta Acustica united with Acustica, Hirzel Verlag, 2018, 104 (4), pp.553-560. ⟨10.3813/AAA.919196⟩
Acta Acustica united with Acustica, 2018, 104 (4), pp.553-560. ⟨10.3813/AAA.919196⟩

International audience; The three-dimensional vibrational behavior of a piezoelectric circular ring made of a 6 mm hexagonal material is studied using Legendre polynomial method. The method is simple to implement and based on expanding the electrical

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::c51a223c178f0fedfb77d6e61b2c2689
https://hal.archives-ouvertes.fr/hal-03185120

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Modeling of a PZT5A MEMS resonator disc partially metallized: Annular metallization

Autor: T. Gryba, L. Elmaimouni, Y. Belkassmi, F. E. Ratolojanahary, M. Rguiti, I. Naciri, A. Rguiti, Salah-ddine Krit, J.E. Lefebvre

Publikováno v: 2017 International Conference on Engineering & MIS (ICEMIS)
2017 International Conference on Engineering & MIS (ICEMIS), May 2017, Monastir, Tunisia. pp.1-8, ⟨10.1109/ICEMIS.2017.8272972⟩

International audience; An extension of the orthogonal polynomial approach in order to solve wave propagation in a MEMS resonator disc in the case of annular metallization is reported in the following paper. The disc is made from PZT5A and has been d

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::a83d60466177c459e36c93e0a88bcf17
https://uphf.hal.science/hal-03564061

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Modeling of MEMS Resonator Piezoelectric Disc Partially Covered with Electrodes

Autor: Jean-Etienne Lefebvre, T. Gryba, Mohamed Rguiti, F. E. Ratolojanahary, L. Elmaimouni, I. Naciri

Publikováno v: American Journal of Mechanics and Applications
American Journal of Mechanics and Applications, 2016, 4 (1), pp.1-9. ⟨10.11648/j.ajma.20160401.11⟩

International audience; The Legendre polynomial method has been extended to the modeling of MEMS resonator disc partially covered with electrodes. The disc has been divided into two areas: one with electrodes and the other without electrodes. For eac

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::12dc4607d2f39674e87b7edba47be9c3
http://hdl.handle.net/20.500.12210/80524

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Polynomial approach for modeling a piezoelectric disc resonator partially covered with electrodes

Autor: T. Gryba, J.E. Lefebvre, I. Naciri, Jiangong Yu, P. M. Rabotovao, L. Elmaimouni, F. E. Ratolojanahary, M. Rguiti

Publikováno v: Wave Motion
Wave Motion, Elsevier, 2016, 64, pp.79-91. ⟨10.1016/j.wavemoti.2016.03.003⟩
Wave Motion, 2016, 64, pp.79-91. ⟨10.1016/j.wavemoti.2016.03.003⟩

International audience; The frequency spectrum of a partially metallized piezoelectric disc resonator was studied using Legendre polynomials. The formulation, based on three-dimensional equations of linear elasticity, takes into account the high cont

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::3933acbfe8af39a26b5b2e6735805fe8
https://hal-uphf.archives-ouvertes.fr/hal-03120077

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Lamb wave acousto-optic modulator in ZnO/MgO multiple quantum wells and comparison with classical modulator

Autor: J. E. Lefebvre, T. Gryba, F. E. Ratolojanahary, L. Elmaimouni

Publikováno v: Applied Optics
Applied Optics, 2015, 54, pp.8786-8794. ⟨10.1364/AO.54.008786⟩
Applied optics
Applied optics, 2015, 54 (29), pp.8786-8794. ⟨10.1364/AO.54.008786⟩

International audience; An analysis of a ZnO/MgO multiple quantum well (MQW) acousto-optic modulator with Lamb waves is performed. With the MQW thickness in the range of 0.2 times the Lamb wavelength, the only observed Lamb modes are the lowest-order

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::843fb548c33422a291e4b191e40672ae
https://hal.archives-ouvertes.fr/hal-03245239

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A polynomial approach to the analysis of guided waves in anisotropic cylinders of infinite length

Autor: V. Zhang, T. Gryba, L. Elmaimouni, Jean-Etienne Lefebvre

Publikováno v: Wave Motion
Wave Motion, 2005, 42, pp.177-189
Wave Motion, Elsevier, 2005, 42, pp.177-189

We present a polynomial approach for determining the guided waves in homogeneous infinitely long cylinders utilizing elastic materials of cylindrical anisotropy. The formulation is based on linear three-dimensional elasticity. The displacement compon

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::ae86f526d1fcc26cb85ddbec90f25f4e
https://doi.org/10.1016/j.wavemoti.2005.01.005

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Acoustic wave propagation in functionally graded materials cylindrically: Polynomial approach

Autor: F. E. Ratolojanahary, L. Elmaimouni, Jean-Etienne Lefebvre, T. Gryba

Publikováno v: Proceedings of 2nd World Conference on Complex Systems, WCCS 2014
Proceedings of 2nd World Conference on Complex Systems, WCCS 2014, Nov 2014, Agadir, Morocco. IEEE, 2014 Second World Conference on Complex Systems (WCCS), pp.440-445, ⟨10.1109/ICoCS.2014.7061006⟩

poster session I - Modeling and Control Systems Complexity; International audience; A new approach is presented to determine the guided waves in hollow FGM cylinders made up of macroscopically inhomogeneous composite materials. The materials properti

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::f902d63302e8e332f3de76ea21d97b68
https://uphf.hal.science/hal-04084427

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Two true surface acoustic waves and other acoustic modes in (110) plane of Li2B4O7 substrate

Autor: T. Gryba, Victor Y. Zhang, J. E. Lefebvre

Publikováno v: Journal of Applied Physics. 86:3361-3370

The surface acoustic waves (SAWs) and other acoustic modes propagating in the (110) plane of Li2B4O7 are investigated by means of the effective surface permittivity (ESP). It is demonstrated that the velocity of all piezoactive SAWs, both true and ps

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::ee57863cc0f4cd704348ed1f26804d08
https://doi.org/10.1063/1.371214

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