Over my research career, I have made recognized contributions in vibration and acoustics (during my PhD at INSA Lyon and during my Associate Professor position at FEMTO-ST), and in the past 10 years, in smart materials and structures (professor at SUPMICROTECH-ENSMM/FEMTO-ST). I have authored or co-authored over 75 peer-reviewed papers.
My research is now centered on the use of smart materials and structures for vibroacoustic applications, as you can see in some recent videos:
H2020 CS2 SALUTE https://vimeo.com/763667325/abffe92233
ANR ETNAA https://vimeo.com/692776379 (eTNAA)
H2020 BBI SSUCHY https://www.youtube.com/watch?v=HniqJyA9RRU
I summarize below some of my contributions.
Main contributions in structural dynamics, wave propagation and vibroacoustics
Since my PhD at INSA Lyon in 2002, I was able to develop my work around methodologies for designing and validating models in structural dynamics and vibroacoustics. These activities are essentially based on modelling, with a view to understanding how waves (both elastic and acoustic) propagate in complex structures. I also pay particular attention to aspects related to robustness and uncertainties, which can for example be sources of hypersensitivity, or which can be used in an original way to build robust projection bases in reduced-order modelling strategies, to rank sub-optimal solutions of complex problems, or even show the superiority in terms of robustness of a simplified model compared to a more precise a priori model. In the current context of growing structural complexity, the sizes of the models are more and more important and the techniques of reduction of models remain necessary despite the increase in the means of calculation. I was thus able to contribute to the development of a sub-structuring method in acoustics, or to the construction of model reduction techniques in vibroacoustics in linear, non-linear, in medium frequencies, and in couplings between electromagnetics, structural dynamics and acoustics for electric motors. Since more than 10 years, I am contributing to wave propagation in architected structures, with an emphasis on effect of damping, but also for non-classical media or auxetic structures, with various applications including wave focusing.
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Optimal positioning of spot welds in automotive structures for vibration control, 2004, https://doi.org/10.1016/j.ymssp.2009.09.012 | Acoustic radiation from automotive engines using a substructuring method, 2009, https://doi.org/10.1115/1.2013302 | Wave propagation in complex lossy periodic structures, 2011, https://doi.org/10.1016/j.ijsolstr.2011.06.002 | Acoustic wave propagation in silicone foams, 2018, https://doi.org/10.1177/0021955X17732305 |
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Micromorphic models for wave propagation in non-classical mechanical media, 2018, https://doi.org/10.1007/s10659-017-9633-6 | Vibroacoustic behavior of electric motors, 2015, https://doi.org/10.1016/j.jsv.2015.03.010 | Wave propagation in hierarchical auxetic rectangular perforated composite metamaterials, 2017, https://doi.org/10.1016/j.compstruct.2016.10.121 | Wave focusing in architected structures, 2021, https://doi.org/10.46298/jtcam.6652 |
Main contributions in smart materials & structures for vibroacoustic applications
FEMTO-ST is recognized as one of the main labs in France and Europe for smart materials and structures. My first experience on this topic was focusing on the dynamic behavior of shape memory alloys. We were able to show that it was possible to take advantage of the phase transition of the alloy to improve the shock absorption of a device. This activity then evolved towards the modeling and characterization of the dynamic behavior of shape memory polymers. This this research made it possible to show that beyond its properties linked to shape memory, this material possesses unprecedented characteristics in terms of damping, which we take advantage of in multilayer composites with temperature-controlled damping. This work enabled Pauline Butaud, my doctoral student at this time, to be the winner of a "For Women and Science" grant from the L'Oréal-Unesco Foundation, whose jury is chaired by the President of the Academy of Sciences (20 laureates out of 820 candidates). These material-related aspects find their counterpart on the structural side, with for example work on the properties in terms of wave propagation in kirigami structures -folded, cut-out- auxetic -with negative Poisson's ratio-. We have developed over the past few years a set of activities around functional periodic structures for vibroacoustics. We have thus introduced the concept of metacomposite, a periodic structure whose elementary cell consists of a supporting structure and a piezoelectric patch shunted by an electrical circuit optimized for vibroacoustic functions (creation of a vibration barrier, maximization of damping...). This work has then been extended for the control of the acoustic radiation of structures. For the estimation of wave propagation levels with deterministic excitation, some tools have been proposed for computing the response using the Wave Finite Element method, for homogeneous or composite structures. The experimental validation of the metacomposite has been carried out a few years ago. A synthesis of all this work made the cover of the IEEE Sensors journal in 2017. As part of an ITN VIPER project, which ended in 2020, numerous investigations led to intensive contributions to this wave propagation in periodic structures. Finally, my current work is strongly influenced by multiphysics aspects: vibroacoustics of electrical machines, control of mechanical properties of structures by thermal control using electroactive polymers, piezoelectric or electroactive devices. These activities are at the center of my research group at the Department of Applied Mechanics of the FEMTO-ST institute, and which is funded by numerous institutional and industrial projects.
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Num. vs. Exp. for temperature-driven adaptive phononic crystal slab, 2019, https://doi.org/10.1088/1361-665X/aaf670 | Active liner for acoustic noise control in aeronautics, 2018, https://doi.org/10.1016/j.jsv.2018.04.009 | Band gap tuning in metacomposites, 2015, https://doi.org/10.1177/1045389X14536006 | |
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In-core heat distribution control for adaptive damping and stiffness tuning of composite structures, 2020, https://doi.org/10.1088/1361-665x/ab802a
| Zero wave reflections by a 1D acoustic black hole termination using thermally controlled damping, 2022, https://doi.org/10.1016/j.jsv.2021.116282 | Electro-active based Helmotz resonator for acoustic waves control, 2017, https://doi.org/10.1088/1361-665X/aad939 | Origami-based auxetic tunable Helmholtz resonator for noise control, 2021, https://doi.org/10.1088/1361-665X/abe180 |
