John Botsis
Mission
LMAF mission is to establish contemporary experimental theoretical numerical expertise in solid mechanics, mechanics of advanced materials, fracture and fatigue, bone and dental biomechanics as well as structural reliability in order to offer the best possible quality of training (including continuing education), expand the knowledge base on these fields by basic and applied research and offer the necessary support to industry. The research at LMAF is focused on the mechanics of solids and structures with special emphases on damage and fracture of composites, reliability analysis, contact mechanics, dynamics and biomechanics. The research relies on a growing network of academic collaborations within Switzerland, Europe and the United States and is funded by Federal and Local Agencies. The LMAF also offers courses in fracture mechanics, composites, reliability, computational methods, thermomechanics as well as biomechanics. Projects, diploma thesis and Ph.D. thesis are proposed in each area of research.The LMAF has the competence and equipment necessary for the resolution of various R&D problems in industry within its area of activity. It includes activities on vibrations and modal analysis, experimental mechanics and numerical analysis of mechanical systems.
Biographie
D'origine et de nationalité grecques, John Botsis est né en 1955. Il obtient le diplôme d'ingénieur civil à l'Université de Patras Grèce, en 1979. Il continue sa formation au Case Institute of Technology à Cleveland Ohio/USA, où il obtient son doctorat ès sciences en 1984.
Après deux ans au Centre de recherche pour la défense nationale à Athènes, il est nommé professeur assistant au département de génie civil et des matériaux de l'Université de l'Illinois à Chicago, puis associé en 1991 et full en 1995. En 1996 il est nommé professeur de mécanique des solides et des structures à l'EPFL.
Il est invité à titre de collaborateur scientifique à l'Air Force Office of Scientific Research à Washington D.C. en 1991-92 où il a travaillé sur les directions d'avenir des recherches en mécanique des solides de l'US Air Force.
Son enseignement et sa recherche couvrent la mécanique des solides et la mécanique de la rupture de divers matériaux, dont les polymères, les biomatériaux,lesmétauxetlescompo-sites en vue d'applications industrielles et médicales. Il s'intéresse également à l'étude expérimentale de la fracture et à la stabilité et à la fiabilité des structures.
Publications
PUBLICATIONS REPRESENTATIVES
E. FARMAND-ASHTIANI, D. ALANIS, J. CUGNONI & J. BOTSIS Composites Science and Technology, 119, 2015, pp. 85-92. |
Delamination in cross-ply laminates: Identification of traction-separation relations and cohesive zone modeling |
E. FARMAND-ASHTIANI, J. CUGNONI & J. BOTSIS, International Journal of Solids and Structures, 55, 2015, pp. 5865. |
Specimen thickness dependence of large scale fiber bridging in mode I interlaminar fracture of carbon epoxy composite |
R. SARFARAZ, L. P. CANAL, G. VIOLAKIS, J. BOTSIS, V. MICHAUD & H. G. LIMBERGER Composites Part A, 73, 2015, pp. 176185 |
An experimental-numerical investigation of hydrothermal response in adhesively bonded composite structures |
G. FROSSARD, J. CUGNONI, T. GMÃR & J. BOTSIS Composites Part A, 91, 2016, pp.1-8. |
Mode I Interlaminar Fracture of Carbon Epoxy Laminates: Effects of Ply Thickness |
R. AMACHER, J. CUGNONI, J. BOTSIS,, L. SORENSEN, W. SMITH & C. DRANSFELD, Composites Science and Technology, 101, 2014, pp. 121132. |
Thin Ply Composites: An Experimental Characterization of the Size Effect |
M. LAI, J. BOTSIS & J. CUGNONI Composites Part B, 60, 2014, pp. 577585 |
Interfacial damage characterization in glass/epoxy system: an experimental approach with embedded sensors and numerical modeling |
B. D. MANSHADI, E. FARMAND-ASHTIANI, J. BOTSIS & A. P. VASSILOPOULOS, Composites Part A, 61, 2014, pp. 4350. |
An iterative analytical/experimental study of bridging in delamination of the double cantilever beam specimen |
B. D. MANSHADI, A. P. VASSILOPOULOS & J. BOTSIS Composites Science and Technology, 83, 2013, pp. 3239. |
A combined experimental/numerical study of the scaling effects on mode-I delamination of GFRP |
M. MALEKI, J. CUGNONI & J. BOTSIS Acta Materialia, 61, 2013, pp. 103114. |
Microstructural-based Modeling of Ageing Effect on Deformation Behavior of Eutectic Phase in SnAgCu Lead-Free Solder |
J. FRIEDEN, J. CUGNONI, J. BOTSIS & TH. GMÜR Composite Structures, 94, 2012, pp. 438445 |
Low energy impact damage monitoring of composites using dynamic strain signals from FBG sensors - Part I: Impact detection and localization |
J. FRIEDEN, J. CUGNONI, J. BOTSIS & TH. GMÜR Composite Structures, 94, 2012, pp. 593600. |
Low energy impact damage monitoring of composites using dynamic strain signals from FBG sensors - Part II: Damage identification |
S. STUTZ, J. CUGNONI & J. BOTSIS Composites Science and Technology, Vol. 71, 2011, pp. 443-449. |
Studies of mode I delamination in monotonic and fatigue loading using FBG wavelength multiplexing |
J. FRIEDEN, J. CUGNONI, J. BOTSIS, T. GMÜR T, & G. CORIC Composite Structures, Vol. 92, 2010, pp. 19051912. |
Internal strain measurements in composite structures under dynamic load using embedded FBG sensors |
L. P. CANAL, G. PAPPAS & J. BOTSIS Composites Science and Technology, 126, 2016, pp. 52-59. |
Large scale fiber bridging in mode I intralaminar fracture. An embedded cell approach |
L. SORENSEN, J. BOTSIS, TH. GMÜR & L. HUMBERT
Composites Science & Technology, Vol. 68, 2008, pp. 2350-2358. |
Bridging tractions in mode-I delamination: measurements & simulations |
M. BERGOMI, J. CUGNONI, J. BOTSIS, U. C. BELSER & H.W. A. WISKOTT Journal of Biomechanics, Vol. 43, 2010, pp. 11461152. |
The role of the fluid phase in the viscous response of bovine periodontal ligament |
G. PAPPAS & J. BOTSIS International Journal of Solids and Structures, 85-86, 2016, pp. 114-124. |
Intralaminar fracture of unidirectional carbon/epoxy composite: experimental results and numerical analysis |
E. FARMAND-ASHTIANI, J. CUGNONI & J. BOTSIS, Composites Science and Technology, 137, (2016), pp. 52-59. |
Effects of large scale bridging in load controlled fatigue delamination of unidirectional carbon-epoxy specimens |
G. PAPPAS, L. P. CANAL & J. BOTSIS Composites Part A, 91, 2016, pp. 117â126. |
Characterization of intralaminar mode I fracture of AS4/PPS composite using inverse identification and micromechanics |
Enseignement & Phd
Enseignement
- Mechanical Engineering,
Programmes doctoraux
- Doctoral Program in Materials Science and Engineering
- Doctoral Program in Mechanics
Doctorants
A dirigé les thèses de
Bergomi Marzio ...Borotto Marco ...
Bosia Federico ...
Colpo Fabiano ...
Dunkel Gabriel ...
Farmand Ashtiani Ebrahim ...
Frieden Jeannot ...
Frossard Guillaume ...
Galli Matteo ...
Kohler Sébastien ...
Lai Marco ...
Maleki Milad ...
Nasri Nassima ...
Pappas Georgios ...
Piccinini Marco ...
Pietrzyk Jaroslaw ...
Rhême Martin ...
Sanctuary Colin ...
Sivasubramaniam Venkatesh ...
Sorensen Larissa ...
Studer Michel ...
Stutz Samuel ...
Cours
Fracture mechanics
L'étudiant acquiert les notions d'endommagement; les bases de taux de restitution d'énergie et le facteur d'intensité de contrainte; critères de rupture; fonctions de poids pour des déplacements d'ouverture de la fissure; l'intégrale J et rupture non-lin...
Mécanique des structures (pour GM)
L'étudiant acquiert les bases de l'analyse des contraintes et déformation des poutres élastiques linéaires soumises à la traction, cisaillement, torsion, flexion; les coefficients d'influence et la méthode de l'énergie pour analyser des systèmes isostati...