John BotsisJohn (Ioannis) Botsis obtained his diplôme in civil engineering at the University of Patras, Greece in 1979. He continued his education at Case Institute of Technology in Cleveland Ohio/USA, where he received his MS and Ph.D. in 1984. After two years at the research center for national defense in Athens he was nominated assistant professor at the University of Illinois in Chicago, associate in 1991 and full professor in 1995. In 1996, he was nominated professor of solids and structural mechanics at the EPFL. At EPFL he teaches mechanics of structures and mechanics of continuous media´ at the bachelors level and Fracture mechanics at the masters and doctoral levels. His research covers the mechanics of solids and structures, fracture mechanics and micromechanics of polymers, metals and their composites as well as biomechanics. He is also actively involved in full-filed optical methods for surface strain measurements as well as internal strain measurements using fiber Bragg grating sensors, aimed at characterizing micromechanics of fracture, residual strains and strain distribution in composite laminates for structural monitoring. Funding for his research comes from the Swiss National Science Foundation, State Secretariat for Education and Research and Swiss industry. He retired on February 28, 2020.
Yves LeterrierYves Leterrier joined EPFL in 1993 and is a faculty member of the Materials Institute. He is a senior scientist and lecturer in the Laboratory for Processing of Advanced Composites (LPAC, previously Laboratory of Composite and Polymer Technology, LTC). Activities
2000-2005: Foundation and Chair of the Korea-Switzerland joint symposia on materials and micro-technologies2004-2008: Board member of FLEXIDIS (the European flexible display consortium) 2004-2009: Group leader on lightweight materials for Solar ImpulseSince 2008: Board member of the French Adhesion SocietySince 2000: President of the EPFL Materials Science Library commissionSince 2012: Editorial board member, Applied Surface ScienceSince 2014: Associate Editor, Frontiers in MaterialsSince 2021: Coordinator of the EPFL Minor on 'Engineering for Sustainability'
Background
1987: MS in materials science and solid state physics (INPL, France) 1991: PhD in materials science (Ecole des Mines, INPL, France) 1992: Research Associate, National Institute of Standards and Technology (NIST, USA)
Philippe SpätigPhilippe Spätig is currently Adjunct Professor at EPFL in the School of Basic Sciences, in the Laboratory of Reactor Physics and Systems Behaviours. He obtained his diploma of Engineer Physicist at EPFL in 1991 and his PhD at EPFL in 1995 on the role of thermal activation in the plasticity of the intermetallic Ni3Al. From 1995 to 1997, he worked as postdoc in the Materials Group of the Center for Research in Plasma Physics at EPFL, studying the effects of high-energy proton irradiation on alloys and pure metals. He then moved to the University of California Santa Barbara and spent two years in the group of Professor G.R. Odette, working on fracture mechanics of ferritic structural steels. He joined again the Materials Group of the Center for Research in Plasma Physics at EPFL in 2000 and worked in this group until the end of 2012. His research was focused on irradiation hardening and embrittlement of steels, as well as on the development of oxide dispersion strengthened steels. He also worked and developed experimental and analytical small specimen test techniques to reliably extract mechanical properties from limited material volume. In 2013, he joined the Laboratory for Nuclear Materials at Paul Scherrer Institute, while being associated with the Laboratory for Reactor Physics and System Behaviours at EPFL. Since then he mainly works on environmentally-assisted fatigue and fracture on austenitic and pressure vessel steels, where the effects of light water reactor environment on mechanical properties are investigated.
Jean-Marie Drezet1992-1996: travail de thèse au Laboratoire de Métallurgie Physique sous la direction du Prof. Michel Rappaz, http://library.epfl.ch/theses/?display=detail&nr=1509 1997-2000: projet EMPACT (European Modelling Programme for Aluminium Casting Technologies) 2001-2004: projet VIRCAST (European Virtual Casting) 2005-2006: projet Etude du sciage des barres à laminer (Alcan Fonds) 2005-2006: projet WelAIR (Welding of Airframes, EADS) 2005-2008: soudage faisceau d'électrons des Cu-Cr-Zr (CEA, France) 2006-2008: soudage laser des Al-Li (EADS, France) 2008-2011: co-direction avec le Prof. A. Nussbaumer de la thèse de C. Acevedo sur l'influence des contraintes residuelles sur le desgin en fatigue des joints tubulaires soudés, http://library.epfl.ch/theses/?nr=5056 2007-2011: co-direction avec le Prof. J.-F. Molinari de la thèse de K. Shahim sur la dilatation ventriculaire dans l'hydrocéphalie à pression normale (S. Momjian, HU-Genève et R. Sinkus, ESPCI-Paris), http://library.epfl.ch/theses/?nr=5191 2008-2012: co-direction avec le Prof. M. Rappaz de la thèse de M. Sistaninia sur la simulation de la fissuration par modèles granulaires (Projet CCMX-MERU) 2010-2014: direction avec le Prof. M. Rappaz de la thèse de N. Chobaut sur la simulation des contraintes lors de la trempe de pièces épaisses en alliage d'aluminium à durcissement structural (Projet CCMX-MERU) 2011-2015: direction avec le Prof. H. Van Swygenhoven-Moens de la thèse de P. Schloth sur l'étude de la précipitation lors de la trempe de pièces épaisses en alliage d'aluminium à durcissement structural (Projet CCMX-MERU) Emmanuel DenariéEmmanuel Denarié is a civil engineer, with a PhD in Materials Science. He worked for 3 years in a civil engineering company where he was in charge of the design of structures and the maintenance of bridges. He has 30 years’ experience on research and applications in the field of building materials, advanced concretes, and rehabilitation of reinforced concrete structures. He is since 2000 senior scientist and lecturer in the Laboratory for Maintenance and Safety of structures, at Ecole Polytechnique Fédérale de Lausanne (EPFL), in charge of research and development activities on the application of concretes and advanced cementitious materials to the improvement of existing and new structures. In 2013, under the lead of Emmanuel Denarié, in cooperation with CEREMA, Subdivision des Phares et Balises from Lorient, and Lafarge, a turret at sea (Le Cabon, Brittany, France) was reinforced by a cast on site 60 mm thick UHPFRC shell. The strain hardening mix was developed jointly with Lafarge. This successful application in extreme conditions of access and restraint of the substrate (thin ring geometry) opened the way to large-scale industrial applications of UHPFRC for the reinforcement of existing structures.
Jürgen BruggerI am a Professor of Microengineering and co-affiliated to Materials Science. Before joining EPFL I was at the MESA Research Institute of Nanotechnology at the University of Twente in the Netherlands, at the IBM Zurich Research Laboratory, and at the Hitachi Central Research Laboratory, in Tokyo, Japan. I received a Master in Physical-Electronics and a PhD degree from Neuchâtel University, Switzerland. Research in my laboratory focuses on various aspects of MEMS and Nanotechnology. My group contributes to the field at the fundamental level as well as in technological development, as demonstrated by the start-ups that spun off from the lab. In our research, key competences are in micro/nanofabrication, additive micro-manufacturing, new materials for MEMS, increasingly for wearable and biomedical applications. Together with my students and colleagues we published over 200 peer-refereed papers and I had the pleasure to supervise over 25 PhD students. Former students and postdocs have been successful in receiving awards and starting their own scientific careers. I am honoured for the appointment in 2016 as Fellow of the IEEE “For contributions to micro and nano manufacturing technology”. In 2017 my lab was awarded an ERC AdvG in the field of advanced micro-manufacturing.
Cyril CayronMes recherches: J'ai travaillé comme microscopiste/cristallographe/métallurgiste sur des projets très variés comme les aciers pour le nucléaire, les alliages titane et nickel pour l'aéronautique, les interconnections en cuivre pour la microélectronique, les piles à combustible haute et basse température, le silicium photovoltaïque hétérojonction et monolike, les batteries au lithium à base de LiFePO4 et silicium. Derrière la plupart de ces sujets de recherche appliquée se cachent des problèmes de recherche fondamentale comme celui lié aux transformations de phases. J'ai donc été amené à travailler sur ce sujet passionnant et j'ai pu démontrer que les variants cristallographiques générés par des transitions structurales forment une structure algébrique de groupoïde. Ces travaux ont mené au développement du logiciel de reconstruction des grains parents à partir de données EBSD appelé ARPGE et distribué dans plus de 20 pays. En 2013-2015 j'ai proposé un nouveau modèle cristallographique pour les transformations martensitiques fcc-bcc dans les aciers, comme une alternative à la théorie phénoménologique de la transformation martensitique. Ce modèle a été depuis étendu aux transformations fcc-hcp (type cobalt), bcc-hcp (type titane) et bcc-fcc (type laiton), ainsi qu’à differents modes de maclage mécanique dans les métaux fcc et hcp. Ce modèle à sphères dures montre que la transformation implique une «distorsion angulaire», forme plus générale que le cisaillement. Le modèle prévoit la possibilité que le plan d’interface de certaines macles mécaniques ne soit pas un plan invariant. Un tel cas de maclage « exotique » a été observé expérimentalement par EBSD en 2017 dans un monocristal de magnésium pur. Je travaille maintenant à définir de manière algébrique les concepts de variants (orientation, distortion, correspondance), et sur les types de macles mécaniques (I, II, et d'autres oubliés des théoriques classiques). Mon parcours : 2014-maintenant: Collaborateur scientifique à l'EPFL/LMTM, Neuchâtel, Suisse. J'aide le professeur Roland Logé dans ses travaux de recherche sur les liens entre les fortes déformations, les textures, les tailles de grains et les transformations de phases (diffusives et displacives). Je suis en charge de la salle de métallographie et des caractérisations SEM, EDS, EBSD, TEM, HRTEM. Je codirige trois thèses (Annick Baur, Margaux Larcher, Céline Guidoux). Je suis reviewer pour Acta Mater., Scripta Mater., Acta Cryst., J. Appl. Cryst., Mater. Charact., etc. 2000-2014: Ingénieur de recherche et responsable du groupe Nanocaractérisation, CEA/LITEN, Grenoble, France. 2012 : Habilitation à Diriger des Recherches (HDR). 1996-2000: Thèse sur l'étude par microscopie électronique de composites à matrice aluminium. Directeur de thèse Philippe Buffat, CIME, EPFL, Lausanne, Suisse. J'ai pu montrer un lien cristallographique entre différentes phases des alliages 2xxx et 6xxx et proposer pour la première fois une structure complète pour la phase beta prime des nanoprécipités. 1995-1996: Scientifique du contingent, travail sur les écrans électrochromes, COGIDEV, Rueil-Malmaison, France, fondé par M. André Giraud, ancien ministre de la défense et ancien ministre de l’industrie. 1992-1995: Ecole Nationale Supérieure des Mines de Nancy, France
