Grégory Chagnon Homepage.

About Me

My works focus on the mechanical behaviour of materials in large deformations and concern principally rubber like materials and soft tissues. A main part of my work aims at creating architectured materials that can endure large anisotropic deformations. This work lays on experimental and computational solid mechanics and mechanical engineering studies.

Positions

  • 2013 - now - Associate Professor University of Grenoble, Laboratory TIMC-IMAG
  • 2004 - 2013 - Associate Professor University of Grenoble, Laboratory 3SR
  • 2003 - 2004 - Assistant Professor IFMA Clermont-Ferrand
  • Degrees

  • 2011 - Habilitation Thesis - University of Grenoble
  • 2003 - PhD Thesis - Ecole centrale of Nantes
  • 2000 - MS Mechanics of Materials - Ecole centrale of Nantes
  • Research Interests

  • Rubber-like materials (Silicone rubber);
  • Architectured materials;
  • Soft tissues;
  • Bioelastomers mechanics for medical application;
  • Shape memory alloys (NiTi);
  • Publications

    For my citation indices, see Google Scholar or ResearcherId

    For my Research Gate profile

    Thesis

    [3] Chagnon Grégory
    Contribution to the study of architectured materials in large deformations for biomedical applications
    Habilitation thesis, University of Grenoble, France (2011).

    [2] Chagnon Grégory
    Modelling of Mullins effect in rubber like materials
    PhD thesis, Ecole Centrale de Nantes, France (2003).

    [1] Chagnon Grégory
    Modelling of damage in rubber like materials
    Master thesis, Ecole Centrale de Nantes, France (2000).

    Articles in peer-reviewed journals

    [34] Breche, Q., Chagnon, G., Machado, G., Nottelet, B., Garric, X., Girard, E., Favier, D. (2016).
    Mechanical behaviour's evolution of a PLA-b-PEG-b-PLA triblock copolymer during hydrolytic degradation.
    Polymer Degradation and Stability, 131, 145-156. doi link

    [33] Rebouah, M., Chagnon, G., Heuillet, P. (2016).
    Anisotropic viscoelastic models in large deformation for architectured membranes.
    Mechanics of Time-Dependent Materials, doi:10.1007/s11043-016-9324-x. doi link

    [32] Stricher, A., Rinaldi, R. G., Machado, G., Chagnon, G., Favier, D., Chazeau L., Ganachaud, F. (2016).
    Light-Induced Bulk Architecturation of PDMS Membranes.
    Macromolecular Materials and Engineering, 301, 1151-1157 doi link

    [31] Marckmann, G., Chagnon, G., Le Saux, M., Charrier, P. (2016).
    Experimental investigation and theoretical modelling of induced anisotropy during stress-softening of rubber.
    Mechanics of Advanced Materials and Structures, 97-98, 554-565. doi link

    [30] Machado, G., Stricher, A., Chagnon, G., Favier, D. (2016).
    Mechanical behavior of architectured photosensitive silicone membranes: experimental data and numerical analysis.
    Mechanics of Advanced Materials and Structures, accepted doi link

    [29] Breche, Q., Chagnon, G., Machado, G., Girard, E., Nottelet, B., Garric, X., Favier, D. (2016).
    Mechanical behaviour's evolution of a PLA-b-PEG-b-PLA triblock copolymer during hydrolytic degradation.
    Journal of the Mechanical Behavior of Biomedical Materials, 60, 288-300. doi link

    [28] Samuel, R., Girard, E., Chagnon, G., Dejean, S., Favier, D., Coudane, J., Nottelet, B. (2015).
    Radiopaque Poly(ε-caprolactone) as Additive for X-Ray Imaging of Temporary Implantable Medical Devices.
    Royal Society of Chemistry Advances, 5, 84125. doi link

    [27] Delobelle, V., Chagnon, G., Favier, D., Alonso, T. (2015).
    Study of electropulse heat treatment of cold worked NiTi wire: from uniform to localised tensile behaviour.
    Journal of Materials Processing Technology, 227, 244-250. doi link

    [26] Andriyana, A., Loo, M.-S., Chagnon, G., Verron, E., Ch'ng S.-Y. (2015).
    Modeling the Mullins effect in elastomers swollen by palm biodiesel.
    International Journal of Engineering Science, 95, 1-22. doi link

    [25] Chagnon, G., Rebouah, M., Favier, D. (2015).
    Hyperelastic energy densities for soft biological tissues: a review.
    Journal of Elasticity, 120, 129-160. doi link

    [24] Meunier, L., Chagnon G., Favier, D., Orgéas, L.,(2015).
    Anisotropic large deformation of geometrically architectured unfilled silicone membranes.
    European Journal of Mechanics - A/Solids, 50, 87-99. doi link

    [23] Rebouah, M., Chagnon, G., Favier, D. (2015).
    Development and modelling of filled silicone architectured membranes.
    Meccanica, 50, 11-24. doi link

    [22] Rey, T., Le Cam, J.-B., Chagnon, G., Favier, D., Rebouah, M., Razan, F., Robin, E., Didier, P., Heller, L., Faure, S. and Janouchova, K. (2014)
    An original architectured NiTi silicone rubber structure for biomedical applications.
    Materials Science and Engineering C, 45, 184-190. doi link

    [21] Rey, T., Chagnon, G., Favier, D., and Le Cam, J.-B. (2014)
    Hyperelasticity with rate-independent microsphere hysteresis model for rubberlike materials.
    Computational Materials Science, 90, 89-98. doi link

    [20] Rebouah, M., Chagnon, G. (2014).
    Extension of classical viscoelastic models in large deformation to anisotropy and stress softening.
    International Journal of non-linear mechanics, 61, 54-64. doi link

    [19] Rebouah, M., Chagnon, G. (2014).
    Permanent set and stress softening constitutive equation applied to rubber like materials and soft tissues.
    Acta Mechanica, 225, 1685-1698. doi link

    [18] Machado G., Chagnon G., and Favier D. (2014)
    Theory and identification of a constitutive model of induced anisotropy by the Mullins effect.
    Journal of the Mechanics and Physics of Solids, 63, 29-39 doi link

    [17] Linardon, C., Favier, D., Chagnon, G., Gruez, B. (2014).
    A conical mandrel tube drawing test designed to assess failure criteria.
    Journal of Materials Processing Technology, 214, 447-357 doi link

    [16] Rey, T., Razan, F., Robin, E., Faure, S., Le Cam, J.-B., Chagnon, G., Girard, A., and Favier, D. (2014).
    Mechanical characterization and comparison of different NiTi/silicone rubber interfaces.
    International Journal of Adhesion and Adhesives, 48, 67-74 doi link

    [15] Robert, A., Chagnon, G., Cinquin P. and Moreau-Gaudry, A. (2013).
    Using a 3D needle-tissue force distribution basis to optimise the design of an instrumented needle.
    Computer Methods in Biomechanics and Biomedical Engineering, 16, 320-322 doi link

    [14] Robert, A., Chagnon, G., Bricault I., Cinquin P. and Moreau-Gaudry, A. (2013).
    A generic three-dimensional loading basis applied to a surgical needle inserted into a complex tissue.
    Journal of the Mechanical Behavior of Biomedical Materials, 28, 156-170 doi link

    [13] Rebouah, M., Machado, G., Chagnon, G., Favier, D. (2013).
    Anisotropic Mullins stress softening of a deformed silicone holey plate.
    Mechanics Research Communications, 49(1), 36-43 doi link

    [12] Palengat, M., Chagnon, G., Favier, D., Louche, H., and Plaideau, C. (2013).
    Cold drawing of 316L stainless steel thin-walled tubes: Experiments and finite element analysis.
    International Journal of Mechanical Sciences, 70, 69-78 doi link

    [11] Rey, T., Chagnon, G., Le Cam, J.-B., and Favier, D. (2013).
    Influence of the temperature on the mechanical behavior of two silicone rubbers above crystallization temperature.
    Polymer Testing, 32, 492-501 doi link

    [10] Chagnon, G., Gaudin, V., Favier, D., Orgéas, L., and Cinquin, P. (2012).
    An osmotically inflatable seal to treat endoleaks of type 1, following endovascular aneurysm repair.
    Journal of Mechanics in Medicine and Biology, 12 doi link

    [9] Machado, G., Chagnon, G., and Favier, D. (2012).
    Induced anisotropy by the Mullins effect in filled silicone rubber.
    Mechanics of Materials, 50(1), 70-80 doi link

    [8] Machado, G., Favier, D., and Chagnon, G. (2012).
    Membrane Curvatures and Stress-strain Full Fields of Axisymmetric Bulge Tests from 3D-DIC Measurements. Theory and Validation on Virtual and Experimental results.
    Experimental Mechanics, 52(7), 865-880 doi link

    [7] Toungara, M., Chagnon, G., and Geindreau, C. (2012).
    Numerical analysis of the wall stress in abdominal aortic aneurysm: influence of the material model nearly-incompressibility.
    Journal of Mechanics in Medicine and Biology, 12 doi link

    [6] Machado, G.,Chagnon, G., and Favier D. (2010).
    Analysis of the isotropic models of the Mullins effect based on filled silicone rubber experimental results.
    Mechanics of Materials, 42(9), 841-851 doi link

    [5] Meunier, L., Chagnon G., Favier, D., Orgéas, L., and Vacher, P. (2008).
    Mechanical experimental characterisation and numerical modelling of an unfilled silicone rubber.
    Polymer Testing, 29, 765-777 doi link

    [4] Chagnon G., Verron, E., Marckmann, G. and Gornet, L. (2006).
    Development of new constitutive equations for mullins effect in rubber using the network alteration theory.
    International Journal of Solids and Structures, 43, 6817-6831 doi link

    [3] Chagnon G., Verron, E., Gornet, L., Marckmann, G. and Charrier, P. (2004).
    On the relevance of continuum damage mechanics as applied to the Mullins effect: theory, experiments and numerical implementation.
    Journal of the Mechanics and Physics of Solids, 52, 1627-1650 doi link

    [2] Chagnon G., Marckmann, G. and Verron, E. (2004).
    A comparison of the physical model of Arruda-Boyce with the empirical Hart-Smith model and the Gent model.
    Rubber Chemistry and Technology, 77, 724-735 doi link

    [1] Marckmann, G., Verron, E., Gornet, L., Chagnon G., Charrier, P. and Fort, P. (2002).
    A theory of network alteration for the Mullins effect.
    Journal of the Mechanics and Physics of Solids, 50, 2011-2028 doi link

    Patent

    [1] Favier, D., Alonso, T., Chagnon, G., Liu, Y., and Moreau-Gaudry, A. (2011)
    Aiguille médicale à trajectoire modifiable et pieu pilote à rigidités multiples réalisées par traitement thermique local.
    FR 1159387.

    Chapter in Book

    [1] Luboz, V., Promayon, E., Chagnon, G., Alonso, T., Favier, D., Barthod, C. et Payan, Y. (2012)
    Validation of a Light Aspiration device for in vivo Soft Tissue Characterization (LASTIC).
    in Soft Tissue Biomechanical Modeling for Computer Assisted Surgery, Yohan Payan editor, Springer-Verlag.

    PhD Students

    [9] Brèche Quentin (2016)
    Copolymères triblocs biodégradables PLA-b-PEG-b-PLA pour ingénierie tissulaire. Caractérisation et modélisation de l’évolution de leurs propriétés mécaniques au cours de leur dégradation par hydrolyse.
    University of Grenoble Alpes.
    PhD Supervisor with Denis Favier

    [8] Alonso Thierry (2015)
    Characterization by DMA test and thermomechanical behaviour optimization of NiTi wires - Application to a medical steerable needle.
    University of Grenoble Alpes.
    PhD Supervisor with Denis Favier pdf

    [7] Rebouah Marie (2014)
    Anisotropic stress softening and viscoelasticity in rubber like materials and architectured materials
    University of Grenoble. pdf

    [6] Rey Thierry (2014)
    Contribution to the elaboration, experimentation shape memory alloy Nickel-Titanium/silicone rubber composites
    University of Grenoble.
    PhD Supervisor with Denis Favier and Jean-Benoit Le Cam pdf

    [5] Robert Adeline (2013)
    Navigation d'une aiguille médicale déformable
    University of Grenoble.
    PhD Supervisor with Philippe Cinquin and Alexandre Moreau-Gaudry pdf (in French)

    [4] Linardon Camille (2013)
    Étirage de tubes de précision pour applications biomédicales. Contribution à l'analyse et l'amélioration du procédé par expérimentation, modélisation et simulation numérique
    University of Grenoble.
    PhD Supervisor with Denis Favier pdf

    [3] Machado Guilherme (2011)
    A contribution to the study of induced anisotropy by Mullins effect in silicone rubber
    University of Grenoble.
    PhD Supervisor with Denis Favier pdf

    [2] Palengat Muriel (2009)
    Modélisation des couplages multiphysiques matériaux-produits-procédés lors de l'étirage de tubes : applications aux alliages métalliques usuels
    University of Grenoble - Collaboration Minitubes SA.
    PhD Supervisor with Denis Favier pdf (in French)

    [1] Meunier Luc (2008)
    Contribution à la conception, l’expérimentation et la modélisation de membranes hyperélastiques architecturées anisotropes
    University of Grenoble.
    PhD Supervisor with Denis Favier

    Some Projects

    ANR - RAMMO (Eel-Like Robot with electric sense) 2007-2011

    This ANR Project aiming at the design, construction and control of a 3D eel-like robot with electrical sensing that is usually used by the electric fishes. The robot is composed of 12 vertebras connected through a rotation free joints. The whole robot is covered with a skin that is especially designed in order to avoid perforation due to the water pressure while allowing an easy swimming oriented ondulations. Our team role in this project is to design this skin, composed by a special silicone rubber material.
    Leader: F. Boyer
    Partners: IRCCyN (Nantes)/ GIPSA-LAB (Grenoble) / LMF (Nantes) / SUBATECH (Nantes) / UNIC (Paris)

    Eel Robot

    ANR - ANiM (Architectured Ni-Ti Materials) 2010-2014

    This project aims to develop a new category of innovative materials combining the intrinsic and novel properties of Nickel-Titanium shape memory alloys with purposely engineered topologies allowed by the notion of “architectured materials”. More specifically, we aim to create architectured materials constituted of NiTi wires and tubes. Using fibres cut from thin wires, we will create non-woven random 2D textiles, 3D blocks of low solid densities, and more complex designed architectures. With thin-wall tubes we will create regular cellular materials. To realise these unique structures we apply a range of innovative materials processing techniques, such as plasma sintering, electric resistance welding, diffusion brazing, and silicone elastomer infiltration.
    Our team role is to study and improve the interface between NiTi and silicone rubber.
    Leader: D. Favier
    Partners: LMGC (Montpellier)/ SIMAP (Grenoble) / LARMUR (Rennes) / LIMATB (Lorient) / 3SR (Grenoble)

    NiTi ANiM

    ANR - SAMBA (Silicone Architectured Membranes for Biomedical Applications) 2012-2016

    This project takes its source in an array of works aiming at designing highly deformable anisotropic membranes for medical applications. The silicone rubbers are highly deformable biomaterials widely used by surgeons for their mechanical properties controlled by their crosslinking rate. In current medical applications, the properties of silicones are homogeneous and isotropic. In the present biomimetic approach, our researches aim to provide the clinician elastomeric membranes whose local properties can possibly be non-uniform and will be fully controlled during their elaboration, both in rigidity and anisotropy.
    Leader: G. Chagnon
    Partners: IMP (Lyon)/ MATEIS (Lyon)

    Samba Project Samba Project

    Contact

    phone: +33 (0)4 56 52 00 86
    fax: +33 (0)4 76 76 88 44
    email: gregory [dot] chagnon [at] imag [dot] fr

    Address:
    Laboratoire TIMC-IMAG - BioMMat Team
    Pavillon TAILLEFER
    IN3S INstitut de l'INgénierie et de l'INformation de Santé
    38706 LA TRONCHE CEDEX - FRANCE
    map with GPS coordinates