Guillaume Frossard
École Polytechnique Fédérale de Lausanne
Mode (statistics)Finite element methodBrittlenessComposite laminatesComposite materialEpoxyBridging (networking)Materials scienceWavinessTougheningCohesive elementLaminated compositesExperimental validationDouble cantilever beamStrain energy release rateSpecific modulusFracture (geology)CarbonFiberFracture mechanicsEngineering physicsStructural engineeringDelaminationFiber pull-outMicrostructureFracture toughnessToughnessParametric equation
8Publications
3H-index
52Citations
Publications 8
Newest
#1Guillaume Frossard (EPFL: École Polytechnique Fédérale de Lausanne)H-Index: 3
#2Joël Cugnoni (EPFL: École Polytechnique Fédérale de Lausanne)H-Index: 26
Last. John Botsis (EPFL: École Polytechnique Fédérale de Lausanne)H-Index: 37
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Abstract The effect of ply thickness t in intralaminar fracture of unidirectional thin-ply carbon-epoxy laminates is characterized by testing double cantilever beam (DCB) and compact tension (CT) specimens with different t. While the average intralaminar energy release rate (ERR) at initiation is found equal to the corresponding interlaminar values, the steady-state intralaminar ERRs, only reached in the DCB configuration, are approximately three times higher than the corresponding interlaminar ...
7 CitationsSource
#1Guillaume Frossard (EPFL: École Polytechnique Fédérale de Lausanne)H-Index: 3
#2Joël Cugnoni (EPFL: École Polytechnique Fédérale de Lausanne)H-Index: 26
Last. John Botsis (EPFL: École Polytechnique Fédérale de Lausanne)H-Index: 37
view all 4 authors...
Abstract 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 procedure is required to characterize bridging tractions and to develop accurate prediction models. The method proposed in this work is based on the resistance (R)-curve and assumes fiber bridging tractions decreasing non-linearly with res...
13 CitationsSource
#1Guillaume FrossardH-Index: 3
The demand for carbon/epoxy laminated composites is continuously increasing due to their high specific modulus and strength. Among them, laminates made of particularly thin layers (from t=0.015 to 0.150 mm) and called thin-ply composites are gaining in interest for the larger design space they offer. Moreover, they have outstanding strength properties, thanks to a significant ply thickness effect reflected by a delayed onset of damage. However, the improvement in strength is accompanied by highe...
Source
#1Guillaume Frossard (EPFL: École Polytechnique Fédérale de Lausanne)H-Index: 3
#2Joël Cugnoni (EPFL: École Polytechnique Fédérale de Lausanne)H-Index: 26
Last. John Botsis (EPFL: École Polytechnique Fédérale de Lausanne)H-Index: 37
view all 4 authors...
Abstract 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 is independent of ply thickness, the plateau level is much lower in thin-ply laminates than in thicker ply ones. This effect is attributed to changes in microstructure, caused by the tow spreading process involved in the fabrication o...
27 CitationsSource
#1Guillaume FrossardH-Index: 3
#2Joël CugnoniH-Index: 26
Last. Ioannis BotsisH-Index: 1
view all 4 authors...
#1Guillaume FrossardH-Index: 3
#2Martin BoesigerH-Index: 1
Last. Ioannis BotsisH-Index: 1
view all 5 authors...
#1Guillaume FrossardH-Index: 3
#2Joël CugnoniH-Index: 26
Last. Ioannis BotsisH-Index: 1
view all 4 authors...