Publications

• Article dans une revue

An optimal control problem governed by heat equation with nonconvex constraints applied to selective laser melting process

Tonia-Maria Alam, Serge Nicaise, Luc Paquet

This paper deals with a PDE-constraints optimal control problem applied to an Additive Manufacturing process, namely a selective laser melting. Here, we want to control the temperature gradient inside the domain during a fixed time of heating, by acting on the trajectory of the dynamic Gaussian…

Minimax Theory and its Applications, 2021, 6 (2), pp.191-204. ⟨hal-02302403⟩

• Article dans une revue

Experimental and Numerical Investigations for Quantifying Variability of NR Mechanical Properties after Thermal Aging

Andrés Malo Estepa, Franck Massa, Adnane Boukamel, Thierry Tison, Philippe Champagne, Stéphane Méo, Andreas Wolf

The evolution of mechanical properties of NR with carbon black fillers was examined after a thermal aging step through both experimentation and non-deterministic numerical simulations. A quantification of mechanical properties and associated variability is first proposed for a set of specimens…

Rubber Chemistry and Technology, 2021, 94 (1), pp.160-179. ⟨10.5254/rct.20.80405⟩. ⟨hal-02465445⟩

• HDR

Optimisation des voies alcoolates pour l'élaboration de matériaux céramiques oxydes et de revêtements fonctionnels en réponse aux problématiques environnementales, Optimization of alcoholate routes for the development of oxide ceramic materials and functional coating in response to environmental issues

Philippe Champagne

Le LMCPA est réputé depuis 2000 pour sa capacité à créer diverses pièces céramiques à géométries variables dotées de propriétés remarquables (hautes résistances thermique et mécanique, piézoélectricité, etc ...) et pour sa capacité à synthétiser les poudres nécessaires à cette fabrication. Sur ce…, LMCPA has been renowned since 2000 for its ability to create various ceramic parts with variable geometries endowed with remarkable properties (high thermal and mechanical resistance, piezoelectricity, etc) and for its ability to synthesize the powders necessary for this manufacture. On this last…

• Thèse

Quelques problèmes de contrôle optimal d'équations aux dérivées partielles et applications au procédé de fusion sélective par laser (SLM), Some optimal control problems of partial differential equations and applications to the selective laser melting process (SLM)

Tonia-Maria Alam

Dans cette thèse, nous étudions quelques problèmes de contrôle optimaldes équations aux dérivées partielles avec appliqués au procédé de fusion sélective parlaser. La thèse se compose de quatre chapitres. Dans le chapitre 1, nous introduisonsle sujet de la thèse et nous présentons les principaux…, In this thesis, we study optimal control problems of partial differential equations withan application to the selective laser melting process. The thesis consists of four chapters.In chapter 1, we introduce the topic of the thesis and we present the main results.Chapter 2 deals with an optimal…

Optimisation et contrôle [math.OC]. Université Polytechnique Hauts-de-France, 2020. Français. ⟨NNT : 2020UPHF0022⟩. ⟨tel-03390313⟩

• Article dans une revue

Flash point prediction with UNIFAC type models of ethylic biodiesel and binary/ternary mixtures of FAEEs

Débora Costa Do Nascimento, Natália Daniele Dorighello Carareto, Antonio Marinho Barbosa Neto, Vincent Gerbaud, Mariana Conceição da Costa

In order to guarantee safe handling of a combustible liquid, such as biodiesel, it is important to be aware of its Flash Point (FP). Thus, the present study focused on FP experimental measurement and thermodynamic correlation of binary and ternary mixtures of saturated or unsaturated fatty acid…

Fuel, 2020, 281, pp.118717. ⟨10.1016/j.fuel.2020.118717⟩. ⟨hal-03115520⟩

• Article dans une revue

Modification of hydroxyapatite surface properties by electron irradiation

Guillaume Bai, Jean-Christophe Hornez, Ulrich Maschke, Philippe Supiot, Etienne Bres

In the present work, the modification of wetting properties of EB irradiated HA ceramics are studied under air and N2 gas atmospheres. We show a noticeable increase of the hydrophily of electron irradiated HA ceramics in an air atmosphere and a lesser increase when the samples are irradiated in an…

Radiation Physics and Chemistry, 2020, Radiation Physics and Chemistry, 177, pp.109192. ⟨10.1016/j.radphyschem.2020.109192⟩. ⟨hal-03104388⟩

• Article dans une revue

Hyperbolic Radial Spanning Tree

Lucas Flammant

We define and analyze an extention to the d-dimensional hyperbolic space of the Radial Spanning Tree (RST) introduced by Baccelli and Bordenave in the two-dimensional Euclidean space (2007). In particular, we will focus on the description of the infinite branches of the tree. The properties shown…

Electronic Journal of Probability, 2020. ⟨hal-03024280⟩

• Article dans une revue

Impedance spectroscopy analysis and piezoelectric properties of (Na 0.5 Bi 0.5 ) 0.94 Ba 0.06 TiO 3 + 0.3wt.% Sm 2 O 3 lead-free ceramics sintered at different conditions

Sadia Kennour, Nouara Lamrani-Amaouz, Ahcène Chaouchi, Mohamed Rguiti, Yannick Lorgouilloux, Christian Courtois

(Na0.5Bi0.5)0.94Ba0.06TiO3 + 0.3 wt.% Sm2O3 (named NBT-BT) lead-free piezoelectric ceramics were prepared by normal sintering. The effect of atmosphere sintering on NBT-BT ceramics was investigated through X-ray diffraction, dielectric, ferroelectric and piezoelectric characterizations. Real (Z′)…

Ferroelectrics, 2020, 568 (1), pp.5-22. ⟨10.1080/00150193.2020.1811027⟩. ⟨hal-03480198⟩

• Communication dans un congrès

Design and performance analysis of Rectenna Circuit

Khadija El Batal, Nabil Chakhchaoui, Adil Eddiai, Mounir Meddad, Mohamed Rguiti, M'Hammed Mazroui, Omar Cherkaoui

Abstract Radio Frequency Energy harvesting is an extremely important research subject, linked to sustainability, and could be a potential solution to conventional energy supplies. The main idea is to develop battery-free wireless sensors able to capture the available energy into the mentioned…

2nd International Conference on Advances in Energy Technology, Environmental Engineering and Materials Science, AETEEMS 2018, Dec 2018, El Jadida, Morocco. pp.012006, ⟨10.1088/1757-899X/948/1/012006⟩. ⟨hal-04469995⟩

• Communication dans un congrès

Hybrid additive/subtractive manufacturing system to prepare dense and complex shape ceramic parts

Qirong Chen, Fabrice Petit, Enrique Juste, Marie Lasgorceix, Anne Leriche

As the conventional binder jetting method is limited in terms of achievable density and finish surface, a new concept of hybrid subtractive/additive manufacturing system has been recently developed. The system relies on a modified binder jetting machine which integrates a slurry-based deposition…

Young Ceramists Additive Manufacturing Forum (yCAM 2020), Oct 2020, Online (Covid 19), France. ⟨hal-04393273⟩