Torward cardiovascular monitoring using the stent as biomedical RFID transponder

International audienc

Modeling of multiferroic composites using a multiscale approach with the temperature dependence

International audienc

Mutliphysics Modeling of Thin Layer Magnetoelectric Laminate Composites Using Shell Element

International audienc

Finite-Element Modeling of a Magnetoelectric Energy Transducer Including the Load Effect

International audienceThis paper presents a 2-D mutliphysics modeling of a magnetoelectric (ME) energy transducer using the finite-element method. The electrical impedance load representing the conditioning circuit has been considered in the coupled equations. The coupling model is developed in both the harmonic regime and transient regime. The harmonic model can be used to determine the resonance frequency and optimal load to maximize the delivered power, whereas the transient model is essential to study the energy transfer in the situation of nonlinear circuits such as the employment of the synchronized switch technique. The developed multiphysics model provides a useful tool to the design optimization of energy transducer devices based on ME laminated composites

Multiphysic modeling of magnetoelectric composites by finite elements

International audienc

A new nonlinear multiscale magnetostrictive approach for FEM modelling of magnetoelectric composites under magneto-thermo-elastic loading

International audienc

Multiphysics modeling of magnetoelectric composite disks by a 2D axisymmetric finite element approach

International audienceA 2D axisymmetric finite element multiphysics model is proposed to study magnetoelectric composite disks. This modeling approach includes a nonlinear magneto-elastic model to replicate the behavior of magnetostrictive materials under static conditions. Additionally, it offers a har- monic regime resolution that considers frequency dependence, including the implicit inclusion of eddy currents in the formulation, as well as electrical load. To validate the model, simulation results regarding the dependence of the static magnetic field and frequency are presented and compared with experimental measurements from literature

Multiphysics Modeling of Thin-Layer Magnetoelectric Laminate Composites Using Shell Element

International audienceThis paper proposes to use the nodal shell element in a finite element multiphysics formulation to simulate magnetoelectric (ME) laminate composites constituted of the thin magnetostrictive layers. The multiphysics model takes into account the non-linearity of the thin layer magnetostrictive material as well as the electrical load effects of the ME laminate composites. A trilayer ME Metglas/PZT/Metglas problem is solved in order to prove the efficiency of the proposed method. This study provides the basis to study the ME devices composed of laminated thin layers

Contribution à l'étude de la modélisation électromagnétique des matériaux BIE chargés par des éléments localisés non linéraires actifs pour des applications de filtrages et de conceptions d'antennes

Cette thèse contribue à l étude des matériaux à Bandes Interdites Electromagnétiques (BIE) 1D et 2D dans le domaine des fréquences micro-ondes. Deux axes ont été appliqués : un axe théorique qui analyse à l aide de méthodes numériques les structures BIE et un axe pratique orienté vers la conception d antennes adaptatives. Ainsi, nous avons pu étudier un radôme, établir une fréquence de plasmon fonction du nombre de rangées, insérer des éléments actifs localisés au sein d une structure BIE 2D et étudier une structure BIE de dimensions finies. Les antennes adaptatives ont été réalisées en combinant une antenne patch à une structure BIE 1D et une antenne dipôle à une structure BIE 2D. Les simulations ont montré qu il est possible à l aide d éléments localisés actifs de contrôler électroniquement de manière continue les diagrammes de rayonnement des antennes tout en améliorant leurs performances. La mise en place d un banc de mesure, a permis de confirmer les résultats de simulations.PARIS-BIUSJ-Thèses (751052125) / SudocPARIS-BIUSJ-Physique recherche (751052113) / SudocSudocFranceF