Négar MESBAHI

Jean-Philippe GRAS
31 ans, 1 children
Högsbogatan 11
414 75 Göteborg
00 46 70 984 38 27
[email protected]
Doctor – Engineer
Mechanics/Materials
Skills
Scientific: Soils mechanic, Water flows and Water retention in soils, Near-infrared spectroscopy, Multivariate statistics,
Physico-chemistry of materials…
Numerical simulation: Langage C, Python and Matlab software (development of discrete element and image analysis
programs).
Professional background
From April 2014
Marie Curie Research Fellow
Chalmers University of Technology, Sweden
Study of the creep behavior of soft clays
 Development and testing of soil models
 Development of a software to calibrate the parameters of the models
 Teaching at the master level in geotechnical engineering…
Oct 2011 Oct 2012
Post-doc « Characterization of agricultural soils »
ARVALIS/IRD, France
Oct 2010 Aug 2011
Assistant professor
Oct 2007 Sept 2010
PHD « Mechanic and water retention of unsaturated soils
Jan 2007 Juin 2007
Research trainee
Fév 2005 Août 2005
Engineer trainee
Mai 2004 Août 2004
Engineer trainee
Development of a method to characterize agricultural soils in-situ by near-infrared spectroscopy (3
months in the field / 9 months in the laboratory).
 Sampling and acquisition of spectra in the field
 Building and validation of predictive models, Chemometrics, patent pending
LMGC, IUT of Civil Engineering of Nîmes, UM2, France
 Research on mechanical behavior and water retention in unsaturated soils
 Teaching activities : resistance of materials, hydraulic, technical equipment
LMGC, UM 2, France
Experiment, numerical simulation and modelling of mechanic behaviour and water retention in
unsaturated soils.
 Design and development of innovative experiments
 Development of image analysis (Matlab) and DEM simulation programs (C)
 Modelling of a liquid bridge between two grains…
LMGC, UM2, France
Study of the water retention of a granular materials (glass beads)
 Design and development of experiment, triaxial aparatus
UDT, Conception, Chili
Study of the thermal behavior of wood-polypropylene composite.
 TG-FTIR, rhéometer, extrusion and injection, mechanical characterization
McMaster University, Hamilton, Canada
Study of phase change in gold-platinum nanolayers.
 Scanning Electron Microscopy (SEM) and Transmission (TEM)
Main Communications
Publications
J.-P. Gras, J.-Y. Delenne, F. Soulié and M. S. El Youssoufi, DEM and experimental analysis of the
water retention curve in polydisperse granular media, Powder Technology, Vol 208, Issue 2, 2011,
pages 296-300, 2011.
J.-P. Gras, J.-Y. Delenne, et M. S. El Youssoufi, Approche micromécanique du phénomène de
rétention d'eau dans un milieu granulaire polydisperse, Revue Mécanique Appliquée et Théorique,
Vol. 2, 2., pages 177-187, 2010.
J.-P. Gras, J.-Y. Delenne, et M. S. El Youssoufi, Study of capillarity at the local scale : a new
experimental device with control in suction, Granular Matter, Vol. 15, Issue 1, pages 49-56, 2013.
J.-P. Gras, B.G. Barthès, B. Mahault, S. Trupin, Best practices for obtaining and processing field
visible and near infrared (VNIR) spectra of topsoils, Geoderma, Vol. 214–215, pages 126–134, 2014
International
conferences
J.-P. Gras, J.-Y. Delenne, F. Soulié and M. S. El Youssoufi, Micromechanical analysis of water
retention phenomenon, Powders and grains, Golden, Colorado, U.S.A, 13-17 Juillet 2009.
J.-P. Gras, J.-Y. Delenne, F. Soulié and M. S. El Youssoufi, DEM and experimental analysis of the
water retention curve in polydisperse granular media, STPMF, Montpellier, France, 27-29 Mai 2009.
J.-P. Gras, J.-Y. Delenne et M. S. El Youssoufi, Approche micromécanique du phénomène de rétention
d'eau dans un milieu granulaire polydisperse, 9ème Congrès de Mécanique, Marrakech, Maroc, 2124 Avril 2009.
J-P Gras, S. Trupin, B. Mahaut, B. Barthès, Optimization of in situ soil characterization by NIRS,
icnirs2013, Grande-Motte, France, 3-7 Juin 2013.
Formation
2007 - 2010
2006 - 2007
2002 - 2005
2000 - 2002
PHD in soils mechanics
Master 2 in mechanics
Materials Engineer
Preparatory classes to Engineer schools
LMGC, University of Montpellier 2
University of Montpellier 2
Polytech' Montpellier
Lycée Daudet, Nîmes
Additional Informations
Languages
Seasonal work
Volontary work
Sport
French native, fluent english, fluent spanish
Grapes harvest, Chestnut grove maintenance, pick up of onions, working-holidays in Australia :
seeler in a vegetable shop in the central market of Adelaïde (6 months)
Ecological project in Eboli, South of Italy
20 years practicing Soccer