About Me

I'm currently a postdoctoral fellow in the BioMMat team (Biomedical and Mechanical engineering of Materials) at TIMC-IMAG Laboratory (Grenoble - France). My domains of research are experimental and computational solid mechanics and mechanical engineering. My work is to combine theoretical, computational and experimental methods to gain deeper insight into the non-linear behavior of materials and structures. The overall goal is exploit material and geometric non-linearities to design novel materials with tunable exceptional properties.

Please download my full curriculum vitae on pdf format.

Research Interests

  • Bioelastomers mechanics for medical application;
  • Architectured materials;
  • Rubber-like materials (Silicone rubber);
  • Shape memory alloys (NiTi);
  • Cellular/foams materials.
  • Tools and Methods

  • Strain field measurements (2D/3D DIC - Digital Image Correlation);
  • Numerical methods in computational mechanics;
  • Finite Element Method;
  • Mesh-less Methods (Element-free Galerkin Method);
  • Numerical estimation of effective properties using finite element method.

  • The aforementioned fields of interest find exciting applications in biomedical engineering!

    Publications

    For my citation indices, see Google Scholar

    Thesis

    [2] Machado G.
    A contribution to the study of induced anisotropy by Mullins effect in silicone rubber
    PhD thesis, Grenoble, France (2011). pdf, 19Mb

    [1] Machado G.
    Element-free Galerkin Method Applied on Polymeric Foams
    Master thesis, Florianopilis, Brazil (2006). manuscript (Portuguese BR), 5.28Mb or presentation (English), 9.25Mb

    Articles in peer-reviewed journals

    [7] Machado G., Louche H., Alonso T., and Favier D.
    Superelastic Architectured NiTi Tube Based Materials: fabrication, experiments and modeling.
    Materials Science and Engineering: A (Submitted article) October, 2013.

    [6] Machado G., Chagnon G., and Favier D.
    Theory and identification of a constitutive model of induced anisotropy by the Mullins effect.
    Journal of the Mechanics and Physics of Solids, 1-21, (In print) July, 2013. doi link

    [5] 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

    [4] 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

    [3] 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

    [2] Machado G., Alves M.K., Rossi R., Silva Jr. C.R.A. (2011).
    Numerical modeling of large strain behavior of polymeric crushable foams.
    Applied Mathematical Modelling, 35(3), 1271-1281 doi link

    [1] Machado G., Chagnon G., 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

    Journals with ranking

    SCImago Journal & Country Rank SCImago Journal & Country Rank SCImago Journal & Country Rank SCImago Journal & Country Rank SCImago Journal & Country Rank SCImago Journal & Country Rank

    Articles in conference proceedings and abstracts

    2013

    [10] Machado G., Louche H., Favier D., Liu Y. (2013)
    Experimental Characterization and Modeling of the Mechanical Behavior of Architectured Tube-Based NiTi Materials.
    Shape Memory and Superelastic Technologies Conference and Exposition (SMST), Prague, Czech Republic, May 2013, Oral acceptance. link

    2012

    [9] Machado G., Rebouah M., Chagnon G., Favier D. (2012)
    Modelling of the Induced Anisotropy by Mullins Effect.
    8th European Solid Mechanics Conference, Graz, Austria, July 2012 link

    [8] Favier D., Alonso T., Chagnon G., Delobelle V., Louche H., Machado G., Waltz L., Rio G., Liu Y., (2012).
    Mechanical behaviour of architectured NiTi materials in complex loading.
    4th International Conference on Smart Materials, Structures and Systems, CIMTEC 2012, Montecatine Terme, Italy, Jun 2012, Invited paper. link

    2011

    [7] Machado G., Chagnon G., Favier D. (2011).
    From the experimental determination of stress-strain full fields during a bulge test thanks to 3D-DIC technique to the characterization of anisotropic Mullins effect.
    Constitutive Models for Rubber VII, S. Jerrams and N. Murphy (Editors),259-263.
    ISBN 978-0-415-68389-0 link

    2009

    [6] Machado G., Chagnon, G., Favier, D. (2009).
    Experimental observation of induced anisotropy of Mullins effect in particle reinforced silicone rubber.
    Constitutive Models for Rubber VI, G. Heinrich, M. Kaliske, A. Lion and S. Reese (Editors), 511-515.
    ISBN 978-0-203-86222-3 doi link

    2007

    [5] Machado G., Alves M.K., Al-Qureshi H.A., Rossi, R. (2007).
    Constitutive modeling of the large strain behavior of crushable foams using the element-free Galerkin method.
    Mechanics of Solids in Brazil 2007, M. Alves and H.S. da Costa Mattos (Editors) Brazilian Society of Mechanical Sciences and Engineering, 161 – 172.
    ISBN 978-85-85769-30-7 pdf

    [4] Machado G., Alves M.K., Al-Qureshi H.A., Rossi R. (2007).
    An element free Galerkin method for the simulation of the finite deformation of polymeric foams.
    In: 19th International Congress of Mechanical Engineering (COBEM), Brasília, Brazil.

    [3] Machado G., Al-Qureshi H.A., De Deus H.P., Alves M.K., Rossi R. (2007).
    A viscoplastic model for the finite strain response of crushable polymeric foams.
    In: 19th International Congress of Mechanical Engineering (COBEM), Brasília, Brazil.

    2004

    [2] Paula C.F., Junior E.S., Liserre L., Machado G., Silva P.A. (2004).
    Cycle Reduction on the Wing Structural Analysis of Commercial Jets.
    In: XXXI Jornadas Sud-Americanas de Ingeniería Estructural, Mendoza, Argentine. 1-14. pdf (Portuguese BR)

    2002

    [1] Machado G., Chiarello, A.G. (2002).
    A Movement Simulation of a recumbent bicycle – Adequate transmission relations analysis.
    In: 5th SIMMEC – Simpósio Mineiro de Mecânica Computacional, Juiz de Fora, Brazil, 171-176. pdf

    Projects

    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.
    Partners: IMP (Lyon)/ MATEIS (Lyon)

    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.
    Owing to the versatility of their structures, these materials offer a range of novel properties that have not been available to date. Combining the unique strength of the material architectures and the novel properties of NiTi, this new category of “smart” materials is expected to have a strong impact in the existing shape memory alloy industry, by drastically enhancing their design capability and competitiveness.
    Partners: LMGC (Montpellier)/ SIMAP (Grenoble) / LARMUR (Rennes) / LIMATB (Lorient) / 3SR (Grenoble)

    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. My role in this project is to design this skin, composed by a special silicone rubber material.
    Partners: IRCCyN (Nantes)/ GIPSA-LAB (Grenoble) / LMF (Nantes) / SUBATECH (Nantes) / UNIC (Paris) / 3SR (Grenoble)

    Contact

    phone: +33 (0)4 56 52 00 86
    fax: +33 (0)4 76 76 88 44
    email: guilherme.machado@nullimag.fr

    Address:
    Laboratoire TIMC-IMAG - BioMMat Team
    Pavillon TAILLEFER
    38706 LA TRONCHE CEDEX - FRANCE
    map with GPS coordinates