Jean-Marie Drezet

Expertise Residual stress measurements using neutron diffraction in metallic partsSolidification and precipitation in aluminium alloysThermomechanical modelling using finite elementsSolidification crackingModelling machining using FEM Expertise Residual stress measurements using neutron diffraction in metallic partsSolidification and precipitation in aluminium alloysThermomechanical modelling using finite elementsSolidification crackingModelling machining using FEM Mission Teaching:- Continuum Mechanics for Materials Science section (MX3)- Practical work (TP) for Materials Science section (MX2)- Fracture Mechanics (MX and GC Master students) - Theory and Practice of finite elements (MX5)Expertise area:- thermomechanical effects (distortions, internal stresses, cracking) in as-cast parts (continuous casting of aluminium billets and rolling sheet ingots)- residual stress measurements using neutron diffraction in metallic parts (PSI-Villigen and ILL-Grenoble)- study of solidification cracking in continuous casting of Al. alloys and in welding- study of the influence of precipitation on stress build-up during quenching of thick aluminium parts (plates and forgings) 1992-1996: PhD work at Laboratoire de Métallurgie Physique under the supervision of Prof. Michel Rappaz(cf : http://library.epfl.ch/theses/?display=detail&nr=1509)1997-2000: EMPACT project (European Modelling Programme for Aluminium Casting Technologies)2001-2004: VIRCAST project (European Virtual Casting)2005-2006: Study of the sawing process of rolling sheet al. ingots (Alcan Fonds)2005-2006: WelAIR project (Welding of Airframes, EADS)2005-2008: study of the electron beam welding of Cu-Cr-Zr alloys (CEA, France)2006-2008: study of the laser beam welding of Al-Li alloys (EADS, France)2008-2011: co-supervision with Prof. A. Nussbaumer of the PhD work of C. Acevedo on the influence of residual stresses on the fatigue design of tubular welded joints, http://library.epfl.ch/theses/?nr=50562007-2010: co-supervision with Prof. J.-F. Molinari of the PhD work of K. Shahim on the Normal Pressure Hydrocephalus (S. Momjian, HU-Genève et R. Sinkus, ESPCI-Paris), http://library.epfl.ch/theses/?nr=51912008-2012: co-supervision with Prof. M. Rappaz of the PhD work of M. Sistaninia on the simulation of solidification cracking using granular models (CCMX-MERU project)2010-2014: supervision with Prof. M. Rappaz of the PhD work of N. Chobaut on the modelling of stresses during quenching of thick heat treatable aluminium parts (CCMX-MERU project)2011-2015: supervision with Prof. H. Van Swygenhoven-Moens of the PhD work of P. Schloth on precipitation during quenching of thick heat treatable aluminium parts (CCMX-MERU project)MAJOR PUBLICATIONS J.-M. Drezet and A. Phillion. As-Cast Residual Stresses in an Aluminum Alloy AA6063 Billet: Neutron Diffraction Measurements and Finite Element Modeling. Mettalurgical transactions A, 41 A:3396-3404, 2010.C. Acevedo, J. M. Drezet, J.-P. Lefebvre, L. D'Alvise, and A. Nussbaumer. Residual stresses in as-welded joints: finite element modeling and neutron diffraction stress measurements. In Z. Tonkovic and M. H. Aliabadi, editors, Advances in Fracture and Damage Mechanics X, Key Engineering Materials, pages 335-338, Zurich, 2012. Trans Tech Publications Ltd.K. Shahim, J.-M. Drezet, J.-F. Molinari, R. Sinkus, and S. Momjian. Finite element analysis of normal pressure hydrocephalus: influence of CSF content and anisotropy in permeability. Applied Bionics and Biomechanics, 7(3):187-197, 2010.J. Vannod, M. Bornert, J. E. Bidaux, L. Bataillard, A. Karimi, J. M. Drezet, M. Rappaz, and A. Hessler-Wyser. Mechanical and microstructural integrity of nickel-titanium and stainless steel laser joined wires. Acta Materialia, 59:6538-6546, 2011.J.-M. Drezet, M.S.-F Lima, J.-D. Wagnière, M. Rappaz and W. Kurz: Crack-free aluminium alloy welds using a twin laser process, invited lecture at the 61st Inter. Conf. of the Inter. Institute of Welding, Graz, July 2008.J.-M. Drezet, O. Ludwig, C. Jaquerod and E. Waz: Fracture prediction during sawing of DC cast high strength aluminium alloy rolling slabs, in Inter. Journal of Cast Metals, 2007, vol. 20, no. 3, p. 163-170.O. Ludwig, C.-L. Martin, J.-M. Drezet and M. Suéry: Rheological behaviour of Al-Cu alloys during solidification: constitutive modelling, experimental identification and numerical study in Met. Mat. Trans, vol 36A, June 2005, p. 1525-1535.M. Rappaz, J.-M. Drezet and M. Gremaud: «A New Hot Tearing Criterion», in Metallurgical and Materials Transactions, vol. 30A, February 1999, pp. 449-455.J.-M. Drezet and M. Rappaz : «Modelling of Ingot Distortions during Direct Chill Casting of Aluminium Alloys », in Metallurgical and Materials Transactions, vol. 27A, no. 10, October 1996, pp. 3214-3225.Miscellaneous - member of the admission commission in Materials Science master programme- member of the library commission of the Materials Science Institute- member of the editorial board of Metallurgical research and technology Teaching & PhD PhD Students Ocson Reginald Cocen Past EPFL PhD Students Nicolas Chobaut Past EPFL PhD Students as codirector Claire Acevedo, Kamal Shahim, Meisam Sistaninia, Farshid Zamiri Akhlaghi, Patrick Schloth Courses Continuum mechanics MSE-203 In this course, the tools to describe the materials not at the atom level but as a continuum are presented. The stress and deformation tensors, the conservation laws (mass, energy, momentum), the linear elasticity and the Newtonian flow are treated using examples of practical applications. Finite element theory and practice MSE-369 The aim of this class is to understand the finite element method i.e. the weak and strong variational formulations and the resolution schemes in space and time. The second part of the semester is dedicated to the practice using the commercial program Abaqus. Fracture of materials MSE-424 This course covers elementary fracture mechanics and its application to the fracture of engineering materials. Materials MSE-171 Introduction course of material science applied to usual building materials, especially concrete and metals. Description of their fabrication, mechanical and thermal properties and use in construction.