Prof. Gaël Chevallier Profile

Prof. Gaël Chevallier

Professor at CNRS / FEMTO-ST

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Publications (6)

Proceedings Article | 20 April 2022 Presentation + Paper

Shape memory through contact: introduction of MagnetoFriction Shape Memory Polymers (MF-SMPs)

Svenja Hermann, Pauline Butaud, Gaël Chevallier, Laurent Hirsinger, Morvan Ouisse

Proceedings Volume 12044, 1204402 (2022) https://doi.org/10.1117/12.2612772

KEYWORDS: Magnetism, Interfaces, Shape memory polymers, Mechanics, Shape memory alloys

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Proceedings Article | 20 April 2022 Presentation + Paper

On the use of thermomechanical couplings for the design of adaptive structures

Morvan Ouisse, Pauline Butaud, Emmanuel Foltête, Gaël Chevallier

Proceedings Volume 12043, 1204302 (2022) https://doi.org/10.1117/12.2612800

KEYWORDS: Composites, 3D modeling, Thermal modeling, Structural design, Shape memory polymers, Crystals, Vibration control, Temperature metrology, Acoustics

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Proceedings Article | 12 July 2019 Open Access

Low flux NGP characterisation for microcarb application

A. Bardoux, A. Ledot, L. Tauziede, G. Chevallier

Proceedings Volume 11180, 111803U (2019) https://doi.org/10.1117/12.2536057

KEYWORDS: Sensors, Black bodies, Infrared spectroscopy, Electronics, Carbon dioxide, Spectroscopy, Calibration, Infrared radiation, Analog electronics, Carbon

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Proceedings Article | 21 March 2019 Presentation + Paper

Adaptive damping and stiffness control of composite structures: an experimental illustration

B. Verdin, D. Renault, P. Butaud, M. Ouisse, E. Joseph, T. Jeannin, E. Foltête, G. Chevallier, E. Sadoulet-Reboul

Proceedings Volume 10967, 1096704 (2019) https://doi.org/10.1117/12.2514555

KEYWORDS: Composites, Temperature metrology, Polymers, 3D modeling, Vibration control, Shape memory polymers, Multilayers

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Proceedings Article | 11 April 2017 Presentation + Paper

Design and experimental validation of an adaptive phononic crystal using highly dissipative polymeric material interface

K. Billon, M. Ouisse, E. Sadoulet-Reboul, M. Collet, G. Chevallier, A. Khelif

Proceedings Volume 10164, 101640O (2017) https://doi.org/10.1117/12.2259889

KEYWORDS: Polymers, Crystals, 3D modeling, Metamaterials, Dispersion, Wave propagation, Aluminum, Structural design, Structural dynamics, Glasses, Shape analysis, Waveguides

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In this paper, some numerical tools for dispersion analysis of periodic structures are presented, with a focus on the ability of the methods to deal with dissipative behaviour of the systems. An adaptive phononic crystal based on the combination of metallic parts and highly dissipative polymeric interface is designed. The system consists in an infinite periodic bidirectional waveguide. The periodic cylindrical pillars include a layer of shape memory polymer and Aluminum. The mechanical properties of the polymer depend on both temperature and frequency and can radically change from glassy to rubbery state, with various combination of high/low stiffness and high/low dissipation. A fractional derivative Zener model is used for the description of the frequency-dependent behaviour of the polymer. A 3D finite element model of the cell is developed for the design of the metamaterial. The ”Shifted-Cell Operator” technique consists in a reformulation of the PDE problem by ”shifting” in terms of wave number the space derivatives appearing in the mechanical behaviour operator inside the cell, while imposing continuity boundary conditions on the borders of the domain. Damping effects can easily be introduced in the system and a quadratic eigenvalue problem yields to the dispersion properties of the periodic structure. In order to validate the design and the adaptive character of the metamaterial, results issued from a full 3D model of a finite structure embedding an interface composed by a distributed set of the unit cells are presented. Various driving temperature are used to change the behaviour of the system. After this step, a comparison between the results obtained using the tunable structure simulation and the experimental results is presented. Two states are obtained by changing the temperature of the polymeric interface: at 25°C, the bandgap is visible around a selected frequency. Above the glass transition, the phononic crystal tends to behave as an homogeneous plate.

Proceedings Article | 11 April 2017 Presentation + Paper

Design of thermally adaptive composite structures for damping and stiffness control

Pauline Butaud, Morvan Ouisse, Gaël Chevallier, Emmanuel Foltête

Proceedings Volume 10165, 101650T (2017) https://doi.org/10.1117/12.2259873

KEYWORDS: Composites, Vibration control, Shape memory polymers, Structural design, Skin, 3D modeling, Mechanics, Polymers, Aluminum

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