1986 Polytechnics "Mechanical engineering" University LYON1.
1988 Master’s degree "Materials science" University LYON 1.
1990 DEA "Materials engineering" INSA de LYON.
1990 Engineer INSA de LYON "Materials science, physics and engineering".
1995 PhD "Materials science and engineering". INSA de LYON.
1991-1995 : PhD at the GEMPPM laboratory. Defence : the 25th of January 1995 : Relation between the mechanical properties and the microstructure of metal matrix composites with particulate reinforcements produced by the OspreyTM route.
1995-1996 : Post doctoral fellow. Mc Master university in the materials science and engineering department. Production and characterisation of model composites with tailored spatial distribution of second phase particles. Modelling of the damage behaviour.
1996-present : junior and then senior researcher (since October 2008) for the French CNRS developing research activities in two fields :
Damage of dense heterogeneous metals
Deformation of fracture of cellular materials
September 2010 to August 2011 : sabattical at Harvard University, Cambridge, Massachusetts, USA, in the laboratory of Prof. Frans Spaepen.
1 month visiting professor at IMR Tohoku university, April 2014
https://scholar.google.fr/citations?user=EprpwdIAAAAJ&hl=fr&oi=ao
Member of Editorial Advisory Board of Materials Characterization
Organiser of 10 symposia in French and international conferences (including Euromat, and EMMC)
Bronze medal of the CNRS section 9 in 2001.
RIST prize of the french federation for materials 2002.
Lecturer for the Federation of European Material Societies (FEMS) 2002.
Alcan-Pechiney price of the French academy of science in 2004, (joint with Jean-Yves Buffière).
Vice president of the French CNRS federation of laboratories 'Federams' 2005-2010
Coordinator of the European Research Group « HETMAT »
Member of the user organisation commitee (secretary) and of the review committee at the ESRF
Member of the French commitee of the « mecamat » society
Member of commitees for the French CNRS
Responsible for different industrial contracts (PhD, post docs) with Lafarge, Arcelor Mittal, Alcan, Schneider electrics, IFP,
Head of the METAL group (15 professors, 30 PhD students and post docs, 3 technicians) of the MATEIS lab from 2015 to 2019.
From 2015 to 2019 Vice-director of the MatéiS laboratory
From January 2019 : director of the MatéiS laboratory. ~ 60 permanent researchers or lecturers, 20 administrative and technical staff and 80 non permanent researchers (PhD students and postdocs) 3.5 ME budget / Year (excluding permanent staff salary)
SUMMARY OF THE RESEARCH ACTIVITIES At the MATEIS laboratory since November 1997
My main research activities is currently the experimental study of bulk damage mechanisms and their effect on the behaviour of microheterogeneous materials with metal matrices. It is part of a wider field studied in the MATEIS laboratory, namely the relation between microstructure and properties of structural materials. The main method I use in my work, to which I have also contributed, is X ray high resolution computed tomography using Synchrotron radiation.
Damage in metal materials initiates in microheterogeous regions with different mechanical and/or physical properties than the matrix. These microheterogeneities might be intrinsic (precipitates, intermetallic inclusions…) or extrinsic (inclusions due to the process, porosities, reinforcing particles in the composites…). Whatever their nature, these heterogeneities concentrate loads and either beak, debond or initiate cracks in the surrounding matrix (i.e. they initiate damage). It is nowadays not clear how to predict where the damage will initiate (in the inclusion, at the interface or in the matrix) and it is also impossible to validate a damage criterion. Such a validation would require quantitative reliable observations associated with an accurate calculation of energies, stresses and deformations of the so defined system : inclusion / interface / matrix. In fact, the calculation is no longer the problem today thanks to improvements in analytical and numerical methods during the past three decades. Note however that these accurate models deal generally with inclusion embedded in a bulky matrix and one knows that the stress fields are strongly affected by a free surface. Damage observation has also improved but it remains based on surface observations. There is then a certain difference between calculations and observations.
This scientific project contains :
The study of damage initiation as a function of different important microstructural parameters, the final goal being the validation of a criterion for damage initiation.
The study of the macroscopic effects of crack initiation on the behaviour of materials.
The most challenging aspect of this work has been the development of the study of damage in the bulk of structural materials thanks to a new experimental technique : X ray high resolution computed tomography using Synchrotron radiation. These novel observations are also coupled with more classical measurements of the stress state in the inclusions using X ray and neutron diffraction.
The second part of my activities is the study of the deformation and fracture behaviour of cellular materials. In these materials, the 3D architecture (i,e, the solid/gaseous phases arrangement in space) has a first-order effect on the properties regardless the nature of the solid phase so ceramic, metallic and polymeric materials are studied. The microstructure of these complex materials has first to be quantified by 3D image processing. Then the deformation behaviour is studied by means of in situ deformation test in tomography. The understanding of this behaviour is mainly tackled by means of FEM calculation based on the exact picture of the microstructure obtain by the available 3D images. The elastic, plastic and fracture properties (including fatigue) are studied.
Recently I have been extensively studying materials for Lithium Ion battery electrodes (4 PhD students supervised).
