Publications

• Article dans une revue

Evaluation of shear piezoelectric coefficients by a bimorph cantilever technique for extruded and oriented poly( l ‐lactide) films

Mohamed Aymen Ben Achour, Cédric Samuel, Mohamed Rguiti, Sophie Barrau, Christian Courtois, Marie‐france Lacrampe

Uniaxially stretched poly(l-lactide) (US-PLA) films display shear piezoelectric properties of interests for smart applications. However, the measurement of these properties is quite challenging and a simple technique based on bimorph cantilevers is here used. This technique is validated with…

• Communication dans un congrès

Legendre Polynomial Approach for Multimodal Analysis of the Transverse-Type Rectangular Piezoelectric Transformer with Common Ground Electrodes

Joli Randrianarivelo, Faniry Emilson Ratolojanahary, Mohamed Rguiti, Derandraibe Jeannot Falimiaramanana

A Legendre polynomial approach (PA) is proposed to forecast a thin film of transverse-type rectangular piezoelectric transformer (PT) performance with common ground electrodes located on its whole bottom surface, fabricated from a PZT5A (lead zirconate titanate) ceramic material. Based on the…

2nd International Conference on Applied Mathematics, Modeling and Computer Simulation, AMMCS 2022, Aug 2022, Wuhan, China. pp.893-899, ⟨10.3233/ATDE221111⟩. ⟨hal-04489843⟩

• Communication dans un congrès

Modeling and Analysis of Transverse-Type Piezoelectric Transformer By Means of a Polynomial Approach

Joli Randrianarivelo, Faniry Emilson Ratolojanahary, Mohamed Rguiti, Derandraibe Jeannot Falimiaramanana, Lahoucine Elmaimouni, Ismail Naciri

A modeling of thin rectangular bar of transverse-type Piezoelectric Transformer (PT) composed by three regions and made from PZT5A (lead zirconate titanate) ceramic material, is reported. The PT (partially metalized on the top and bottom sides) is dedicated to the galvanic isolation. Using the…

IEEE 7th Southern Power Electronics Conference (SPEC), Dec 2022, Nadi, Fiji. pp.1-6, ⟨10.1109/SPEC55080.2022.10058212⟩. ⟨hal-04491708⟩

• Article dans une revue

Post-infiltration to improve the density of binder jetting ceramic parts

Qirong Chen, Enrique Juste, Marie Lasgorceix, Guillaume Lefebvre, Christophe Tenailleau, Benjamin Duployer, David Grossin, Fabrice Petit, Anne Leriche

Infiltration of printed bodies with a ceramic suspension is a relevant approach to enhance density and properties of the porous binder-jetted parts. In the present work, significant improvements of alumina parts processed through this combination printing-infiltration was reported. The density of…

Journal of the European Ceramic Society, 2022, 42 (15), pp.7134-7148. ⟨10.1016/j.jeurceramsoc.2022.08.005⟩. ⟨hal-03889846⟩

• Article dans une revue

Indirect stability of a multidimensional coupled wave equations with one locally boundary fractional damping

Mohammad Akil, Ali Wehbe

In this work, we consider a system of multidimensional wave equations coupled by velocities with one localized fractional boundary damping. First, using a general criteria of Arendt–Batty, by assuming that the boundary control region satisfy some geometric conditions, under the equality speed…

Mathematical News / Mathematische Nachrichten, 2022, 295 (12), pp.2272-2300. ⟨10.1002/mana.202100185⟩. ⟨hal-04346829⟩

• Communication dans un congrès

Modeling complex mechanical computer codes with functional input via Gaussian processes

Andrés F. López-Lopera, Franck Massa, Isabelle Turpin, Nicolas Leconte

Surrogate models based on Gaussian processes (GPs) have been successfully used as a complement of costly-to-evaluate complex computer codes. They are capable to provide accurate predictions with confident intervals but require fewer costs (in both time and resources). Here, we focus on a class of…

The 43th Ibero-Latin American Congress on Computational Methods in Engineering (CILAMCE), Nov 2022, Foz do Iguaçu, Brazil. ⟨hal-03882473⟩

• Communication dans un congrès

High-dimensional additive Gaussian processes under monotonicity constraints

Andrés F. López-Lopera, François Bachoc, O Roustant

We introduce an additive Gaussian process framework accounting for monotonicity constraints and scalable to high dimensions. Our contributions are threefold. First, we show that our framework enables to satisfy the constraints everywhere in the input space. We also show that more general…

Advances in Neural Information Processing Systems, Nov 2022, New Orleans, United States. ⟨hal-03695058⟩

• Thèse

Optimisation des propriétés de céramiques piézoélectriques sans plomb du type BCTZ par modification de la composition et par dopage., Optimization of the properties of lead-free piezoelectric ceramics of the BCTZ type by composition modification and doping.

Blandine Fontaine

Les céramiques piézoélectriques sans plomb de formulation Ba0.85Ca0.15Ti0.90Zr0.10 (BCTZ) sont connus pour leurs propriétés piézoélectriques élevées. Cependant, leurs températures de Curie restent assez basses. Ainsi, cette étude se focalise sur l'optimisation des propriétés des céramiques par…, Lead-free piezoelectric ceramics with Ba0.85Ca0.15Ti0.90Zr0.10 composition (BCTZ) are known for their high piezoelectric properties. However, they present relatively low Curie temperatures. Thus, this study focuses on the optimization of ceramic properties by fine variations of calcium (0.13 < x…

Matériaux. Université Polytechnique Hauts-de-France, 2022. Français. ⟨NNT : 2022UPHF0033⟩. ⟨tel-04030568⟩

• Communication dans un congrès

Synthesis of a new composition of bioactive glass with improved properties

Halima El Bouami, Assia Mabrouk, Cyrille Albert-Mercier, Claudine Follet, Ahmed Bachar

III. INTERNATIONAL CONFERENCE ON GLOBAL PRACTICE OF MULTIDISCIPLINARY SCIENTIFIC STUDIES, Nov 2022, Cyprus, Turkey. ⟨hal-04318754⟩

• Article dans une revue

Performance of a dual piezoceramic cantilever for low frequency energy harvesting applications: modeling and experiment verification

Madiha Yessari, Najoua Fangachi, Imane Salhi, Mohamed Rguiti, Abdelowahed Hajjaji

Vibration-based energy harvesting is a growing field for generating low-power electricity to use in wireless electronic devices. These applications are usually in an environment of abundant low frequency vibration, which can be collected through an appropriate energy conversion structure. However,…

European Physical Journal: Applied Physics, 2022, 97, pp.78. ⟨10.1051/epjap/2022220105⟩. ⟨hal-04280930⟩