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John Botsis

john.botsis@epfl.ch +41 21 693 29 69

EPFL STI-DO
ME A2 400 (Bâtiment ME)
Station 9
1015 Lausanne

Expertise

- Solid and structural mechanics
- Experimental mechanics of advanced materials
- Fracture, fatigue & failure analysis
- Biomechanics & biomaterials

Mission

To develop and use novel experimental techniques to study elementary events of deformation, damage, fracture and fatigue in advanced materials, biomaterials, bone and dental biomechanics as well as durability and reliability of structural components. The experimental results are supported by analytical methods and contemporary numerical tools in order to expand the knowledge base on these fields by basic and applied research, offer the necessary support to industry and provide the best possible quality of training.
John (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 bachelor's level and ‘Fracture mechanics' at the master's 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.

Publications représentatives

Towards a geometry independent traction-separation and angle relation due to large scale bridging in DCB configuration

G. A. PAPPAS & J. BOTSIS
Published in Composites Science and Technology, 197, 2020, 108172 in

A multi-scale based cohesive zone model for the analysis of thickness scaling effects in fiber bridging

L. P. CANAL, M. ALFANO & J. BOTSIS
Published in Composites Science and Technology, 139, 2017, pp. 90-98. in

Large scale fiber bridging in mode I intralaminar fracture. An embedded cell approach

L. P. CANAL, G. PAPPAS & J. BOTSIS
Published in Composites Science and Technology, 126, 2016, pp. 52-59. in

Towards Aerospace Grade thin-Ply Composites: Effects of ply thickness, Fibre, Matrix and Interlayer Toughening on Strength and Damage Tolerance

J. CUGNONI, R. AMACHER, S. KOHLER, J. BRUNNER, E. KRAMER, C. DRANSFELD, W. SMITH, K. SCOBBIE, L. SORENSEN & J. BOTSIS, ‘
Published in Composites Science and Technology, 168, 2018, pp. 467-477. in

Thin Ply Composites: An Experimental Characterization of the Size Effect

R. AMACHER, J. CUGNONI, J. BOTSIS,, L. SORENSEN, W. SMITH & C. DRANSFELD
Published in Composites Science and Technology, 101, 2014, pp. 121–132. in

Characterization of intralaminar mode I fracture of AS4/PPS composite using inverse identification and micromechanics

G. PAPPAS, L. P. CANAL & J. BOTSIS
Published in Composites Part A, 91, 2016, pp. 117–126. in

Delamination in cross-ply laminates: Identification of traction-separation relations and cohesive zone modeling

E. FARMAND-ASHTIANI, D. ALANIS, J. CUGNONI & J. BOTSIS
Published in Composites Science and Technology, 119, 2015, pp. 85-92. in

Effects of large scale bridging in load controlled fatigue delamination of unidirectional carbon-epoxy specimens

E. FARMAND-ASHTIANI, J. CUGNONI & J. BOTSIS,
Published in Composites Science and Technology, 137, (2016), pp. 52-59. in

Micromechanical study on the origin of fiber bridging under interlaminar and intralaminar mode I failure

F. NAYA, G. PAPPAS & J. BOTSIS
Published in Composite Structures, 210, 2019, pp. 877–891 in

Specimen thickness dependence of large scale fiber bridging in mode I interlaminar fracture of carbon epoxy composite

E. FARMAND-ASHTIANI, J. CUGNONI & J. BOTSIS,
Published in International Journal of Solids and Structures, 55, 2015, pp. 58–65. in

Intralaminar fracture of unidirectional carbon/epoxy composite: experimental results and numerical analysis

G. PAPPAS & J. BOTSIS
Published in International Journal of Solids and Structures, 85-86, 2016, pp. 114-124. in

Influence of ply-angle on fracture in anti-symmetric interfaces of CFRP laminates

C. BLONDEAU, G. PAPPAS & J. BOTSIS
Published in Composite Structures, 216, 2019, pp. 464–476 in

Crack propagation in CFRP laminates under Mode I monotonic and fatigue loads: A methodological study

C. BLONDEAU, G. A. PAPPAS, & J. BOTSIS,
Published in Composite Structures, 256, 2021, 113002 in

A combined experimental/numerical study of the scaling effects on mode-I delamination of GFRP

B. D. MANSHADI, A. P. VASSILOPOULOS & J. BOTSIS
Published in Composites Science and Technology, 83, 2013, pp. 32�39. in

Mode I Interlaminar Fracture of Carbon Epoxy Laminates: Effects of Ply Thickness

G. FROSSARD, J. CUGNONI, T. GMÃœR & J. BOTSIS
Published in Composites Part A, 91, 2016, pp.1-8. in

Variations on R-curves and traction-separation relations in DCB specimens loaded under end opening forces or pure moments

G. A. PAPPAS & J BOTSIS
Published in International Journal of Solids and Structures, 191-192, 2020 pp. 42-55 in

Experimental and Numerical Modelling on Angle-Ply Laminates under Remote Mode II Loading

M. HERRÁEZ, N. PICHLER, G. PAPPAS, C. BLONDEAU & J. BOTSIS
Published in Composites Part A, 134, 2020, 105886 in

Mixed-Mode Fracture Response of Anti-symmetric Laminates: Experiments and Modelling

N. PICHLER, M. HERRÁEZ, J. BOTSIS
Published in Composites Part B, 197, 2020, 108089 in

Improving Delamination Resistance through Tailored Defects

M. HERRÁEZ, N. PICHLER & J. BOTSIS
Published in Composite Structures, 247, 2020, 112422 in

The Influence of Through-Thickness Reinforcement Geometry and Pattern on Delamination of Fiber-Reinforced Composites: Part II - Modelling

G. PAPPAS, S. JONCAS, V. MICHAUD & J. BOTSIS
Published in Composite Structures, 181, 2017, pp. 379-390 in

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
Published in Composite Structures, 184, 2018, pp 924-934 in

Studies of mode I delamination in monotonic and fatigue loading using FBG wavelength multiplexing

S. STUTZ, J. CUGNONI & J. BOTSIS
Published in Composites Science and Technology, Vol. 71, 2011, pp. 443-449. in

Recherche

INTRODUCTION A LA MECANIQUE DES SOLIDESS ET DES ST

MICHEL DEL PEDRO
THOMAS GMÃœR
JOHN BOTSIS
3e édition
2012, Presses polytechinques et universitaires romandes
CH - 1015 Lausanne

Mechanics of Continuous Media: an Introduction

John Botsis
Michel Deville
2018, First Edition, EPFL Press
CH-1015, Lausanne

Mécanique des milieux continus Une introduction

JOHN BOTSIS
MICHEL DEVILLE
Deuxième édition
2016, Presses polytechniques et universitaires romandes
CH - 1015 Lausanne

Enseignement et PhD

A dirigé les thèses EPFL de

Michel Studer, Jaroslaw Pietrzyk, Federico Bosia, Colin Sanctuary, Fabiano Colpo, Larissa Sorensen, Matteo Galli, Marzio Bergomi, Gabriel Dunkel, Venkatesh Sivasubramaniam, Samuel Stutz, Jeannot Frieden, Marco Lai, Milad Maleki, Martin Rhême, Marco Piccinini, Ebrahim Farmand Ashtiani, Marco Borotto, Guillaume Frossard, Georgios Pappas, Nassima Nasri, Sébastien Kohler