Publications de Joël Cugnoni | EPFL Graph Search

Translaminar fracture in (non–)hybrid thin-ply fibre-reinforced composites: An in-depth examination through a novel mini-compact tension specimen compatible with microscale 4D computed tomography

Véronique Michaud, Alexios Argyropoulos, Joël Cugnoni, Guillaume Clément Broggi

Translaminar fracture toughness is pivotal for notch sensitivity and damage tolerance of fibre-reinforced composites. Hybridisation offers a promising pathway for enhancing this parameter in thin-ply composites. Three novel mini-compact tension specimen ge ...

2025

Multi-material rail pad and method for manufacturing same

Véronique Michaud, John Christopher Plummer, Holger Frauenrath, Joël Cugnoni, Oguzhan Oguz, Adrien Julien Demongeot

The invention relates to a rail pad (10, lOa-v, 10α-η) comprising: a) a pad matrix (1) comprising a first material and b) at least one damping element (2) at least partially encapsulated or embedded in the pad matrix (1), said damping element (2) comprisin ...

2022

A functional approach towards the design, development, and test of an affordable dynamic prosthetic foot

Kamiar Aminian, Véronique Michaud, John Botsis, Klaus Benedikt Schönenberger, Joël Cugnoni, Mathieu Pascal Falbriard, Rajasundar Chandran

Humanitarian actors involved in physical rehabilitation, such as the International Committee of the Red Cross (ICRC), usually provide their beneficiaries with lower-limb prostheses comprising Solid Ankle Cushion Heel (SACH) feet as these are considered app ...

PUBLIC LIBRARY SCIENCE2022

Transverse cracking in the bulk and at the free edge of thin-ply composites: experiments and multiscale modelling

John Botsis, Robin Amacher, Joël Cugnoni, Sébastien Kohler

Thin-ply composites were shown to exhibit significantly delayed transverse cracking, but the linear onset of damage scaling with ply thickness reported by Amacher et al. (2014) did not correspond to the established LEFM based in situ strength model. This s ...

2019

Analysis and evaluation of friction effects on mode II delamination testing

John Botsis, Joël Cugnoni, Marco Borotto, Lorenzo Mencattelli

2018

Ply thickness dependence of the intralaminar fracture in thin-ply carbon- epoxy laminates

John Botsis, Thomas Gmür, Joël Cugnoni, Guillaume Frossard

2018

Towards aerospace grade thin-ply composites: Effect of ply thickness, fibre, matrix and interlayer toughening on strength and damage tolerance

John Botsis, Robin Amacher, Joël Cugnoni, Larissa Sorensen, Sébastien Kohler

Thin-ply composites represent a promising approach to further improve the performance of carbon fibre composite structures thanks to their ability to delay the onset of matrix cracking and delamination up to the point of fibre dominated failure. However, t ...

ELSEVIER SCI LTD2018

Deformation behavior of nano-porous polycrystalline silver. Part II: Simulations

Joël Cugnoni, Helena Van Swygenhoven, Steven Van Petegem

Three-dimensional finite element simulations of nano-porous silver structures are performed to understand the correlation between the porous morphology and the mechanical behavior. The nano structures have been obtained from ptychographic X-ray computed to ...

Elsevier2017

An efficient method for fiber bridging traction identification based on the R-curve: Formulation and experimental validation

John Botsis, Joël Cugnoni, Thomas Gmür, Guillaume Frossard

Fiber bridging is one of the main toughening mechanisms in mode I interlaminar and intralaminar fracture of laminated composites. Intact fibers exert closing forces on both faces of the crack, restraining crack propagation. An effective identification proc ...

Elsevier2017

Mode I interlaminar fracture of carbon epoxy laminates: Effects of ply thickness

John Botsis, Joël Cugnoni, Thomas Gmür, Guillaume Frossard

In this work, the influence of ply thickness on strain energy release rate (ERR) in delamination of carbon epoxy laminates is addressed. Specimens with three ply thicknesses: 0.030, 0.075 and 0.150 mm are tested. While the ERR at onset of crack propagation ...

Elsevier2016