Publications

• Article dans une revue

Frequency and load effects on rectifier bridges and active circuits on mechanical energy harvested using piezoelectric materials

Youssef El Hmamsy, Chouaib Ennawaoui, Abdelowahed Hajjaji, El Mehdi Laadissi, El Mehdi Loualid, Mohamed Aymen Ben Achour, Oussama Laayati, Ahmed Chebak

Today, with the worldwide surge in the price of oil, the energy issue has become an important topic and the possibility of exploiting ambient energy is receiving renewed attention. Thus in this study, we are interested in the devices of recovery of piezoelectric energy of vibration whose final…

International Journal of Renewable Energy Research, 2023, 13 (2), ⟨10.20508/ijrer.v13i2.13850.g8759⟩. ⟨hal-04491987⟩

• 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…

• 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⟩

• 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

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⟩

• Article dans une revue

Study of the first boulogne-sur-mer cements used for a historic aqueduct from the 19th century, Tudija cementov boulogne-sur-mer, uporabljenih v zgodovinskem akvaduktu iz 19. Stoletja

Marwa Jebbawy, Vincent Thiéry, Myriam Bouichou, Elisabeth Marie-Victoire, Catherine Davy, Laurent Izoret, Cyrille Albert-Mercier, Myriam Moreau

Natural and Roman cements are generally considered as the first binders of the 19th century concrete but their widespread usage was short-lived as they were quickly replaced by artificial cements (Portland), still the most important and predominant today. The Boulogne-Sur-Mer area in the North of…, Naravni in romanski cementi so splo{no znani kot prva veziva v betonu iz 19 stoletja. Njihova {iroka uporaba je bila kratkotrajna, saj so jih hitro nadomestili umetni portlandski cementi, ki {e danes prevladujejo v betonih. Obmo~je Boulogne-Sur-Mer v severni Franciji je eno od zibelk francoske…

Materials and Technology, 2022, 56 (5), 7 p. ⟨10.17222/mit.2022.554⟩. ⟨hal-04329773⟩

• Article dans une revue

Hermite interpolation by planar cubic-like ATPH, Interpolation de Hermite par des courbes ATPH pseudo-cubiques planes

Thierry Bay, Isabelle Cattiaux-Huillard, Laura Saini

This paper deals with the construction of the Algebraic Trigonometric Pythagorean Hodograph (ATPH) cubic-like Hermite interpolant. A characterization of solutions according to the tangents at both ends and a global free shape parameter α is performed. Since this degree of freedom can be used for…

Advances in Computational Mathematics, 2022, 48, ⟨10.1007/s10444-022-09978-8⟩. ⟨hal-03556981v2⟩

• Article dans une revue

Influence of calcium substitution on structural, morphological and electrical conductivity properties of La1- xCaxNi0.5Ti0.5O3 (x = 0.0, x = 0.2) compounds for energy storage devices

Sirine Gharbi, Ahmadou Ly, Essebti Dhahri, Régis Barillé, Driss Lahem, Marc Debliquy, Mohamed Rguiti

This paper explores the effect of calcium insertion on the physicochemical properties of La1-xCaxNi0.5Ti0.5O3 (x = 0.0 (LNTO), x = 0.2 (LCNTO)) compounds fabricated by the sol–gel process. The samples crystallize in an orthorhombic distorted structure with the Pnma space group. The purity and…

Inorganic Chemistry Communications, 2022, 144, pp.109925. ⟨10.1016/j.inoche.2022.109925⟩. ⟨hal-04489910⟩

• Article dans une revue

Water-Based Synthesis of Zr6-Based Metal–Organic Framework Nanocrystals with Sulfonate Functions: Structural Features and Application to Fructose Dehydration

Bakytzhan Yeskendir, Priscilla Magalhaes de Souza, Pardis Simon, Robert Wojcieszak, Christian Courtois, Yannick Lorgouilloux, Sebastien Royer, Jean-Philippe Dacquin, Jérémy Dhainaut

A series of zirconium-based metal−organic framework (MOF) nanocrystals (95−211 nm) displaying sulfonate functions (UiO-66-SO3H) was prepared in N,N-dimethylformamide (DMF) - the conventional solvent - and water, and their physicochemical properties were thoroughly investigated. In particular, X-ray…

ACS Applied Nano Materials, 2022, ACS Applied Nano Materials, ⟨10.1021/acsanm.2c02916⟩. ⟨hal-03794329⟩

• Article dans une revue

An analysis of high-frequency Helmholtz problems in domains with conical points and their finite element discretization

Théophile Chaumont-Frelet, Serge Nicaise

We consider Helmholtz problems in three-dimensional domains featuring conincal points. We focus on the high-frequency regime and derive novel sharp upper-bounds for the stress intensity factors of the singularities associated with the conical points. We then employ these new estimates to analyse…

Computational Methods in Applied Mathematics, 2022, ⟨10.1515/cmam-2022-0126⟩. ⟨hal-04001691⟩