John Botsis
john.botsis@epfl.ch +41 21 693 29 69 http://lmaf.epfl.ch/
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
Sélection de publications
| C. BLONDEAU, G. PAPPAS & J. BOTSIS Composite Structures, 216, 2019, pp. 464–476 |
Influence of ply-angle on fracture in anti-symmetric interfaces of CFRP laminates |
| F. NAYA, G. PAPPAS & J. BOTSIS Composite Structures, 210, 2019, pp. 877–891 |
Micromechanical study on the origin of fiber bridging under interlaminar and intralaminar mode I failure |
| R. AMACHER, J. CUGNONI, S. KOHLER, J. BRUNNER, E. KRAMER, C. DRANSFELD, W. SMITH, K. SCOBBIE, L. SORENSEN & J. BOTSIS, ‘ Composites Science and Technology, 168, 2018, pp. 467-477. |
Towards Aerospace Grade thin-Ply Composites: Effects of ply thickness, Fibre, Matrix and Interlayer Toughening on Strength and Damage Tolerance |
| L. P. CANAL, M. ALFANO & J. BOTSIS Composites Science and Technology, 139, 2017, pp. 90-98. |
A multi-scale based cohesive zone model for the analysis of thickness scaling effects in fiber bridging |
| 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 |
| 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 |
| G. PAPPAS, L. P. CANAL & J. BOTSIS Composites Part A, 91, 2016, pp. 117–126. |
Characterization of intralaminar mode I fracture of AS4/PPS composite using inverse identification and micromechanics |
| 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 |
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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 |
| B. D. MANSHADI, A. P. VASSILOPOULOS & J. BOTSIS Composites Science and Technology, 83, 2013, pp. 32�39. |
A combined experimental/numerical study of the scaling effects on mode-I delamination of GFRP |
| J. FRIEDEN, J. CUGNONI, J. BOTSIS & TH. GM�R Composite Structures, 94, 2012, pp. 438�445 |
Low energy impact damage monitoring of composites using dynamic strain signals from FBG sensors - Part I: Impact detection and localization |
| G. FROSSARD, J. CUGNONI, T. GMÜR & J. BOTSIS Composites Part A, 91, 2016, pp.1-8. |
Mode I Interlaminar Fracture of Carbon Epoxy Laminates: Effects of Ply Thickness |
| 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 |
| J. FRIEDEN, J. CUGNONI, J. BOTSIS & TH. GM�R Composite Structures, 94, 2012, pp. 593�600. |
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 |
| L. SORENSEN, J. BOTSIS, TH. GM�R & L. HUMBERT
Composites Science & Technology, Vol. 68, 2008, pp. 2350-2358. |
Bridging tractions in mode-I delamination: measurements & simulations |
| G. PAPPAS, S. JONCAS, V. MICHAUD, & J. BOTSIS Composite Structures, 184, 2018, pp 924-934 |
The Influence of Through-Thickness Reinforcement Geometry and Pattern on Delamination of Fiber-Reinforced Composites: Part I - Experimental results |
| G. PAPPAS, S. JONCAS, V. MICHAUD & J. BOTSIS Composite Structures, 181, 2017, pp. 379-390 |
The Influence of Through-Thickness Reinforcement Geometry and Pattern on Delamination of Fiber-Reinforced Composites: Part II - Modelling |
Enseignement & Phd
Enseignement
Mechanical Engineering