Concept

Fibré vectoriel

Publications associées (93)

Transverse permeability of chopped fibre bundles with an elliptical cross-section

The out-of-plane permeability of 25 mm-long chopped glass fibre bundle beds was measured. These bundles, used in sheet moulding compound (SMC) composites, have an elliptical cross-section with the major axis perpendicular to the flow direction. An adapted ...

2007

Generic representations of orthogonal groups: the mixed functors

Christine Vespa

In previous work, we defined the category of functors F-quad, associated to F-2-vector spaces equipped with a nondegenerate quadratic form. In this paper, we define a special family of objects in the category F-quad, named the mixed functors. We give the c ...

2007

Some applications of symmetries in differential geometry and dynamical systems

Oana Mihaela Dragulete

This thesis deals with applications of Lie symmetries in differential geometry and dynamical systems. The first chapter of the thesis studies the singular reduction of symmetries of cosphere bundles, the conservation properties of contact systems and their ...

EPFL2007

f-vectors of Minkowski additions of convex polytopes

Christophe Weibel

The objective of this paper is to present two types of results on Minkowski sums of convex polytopes. The first is about a special class of polytopes we call perfectly centered and the combinatorial properties of the Minkowski sum with their own dual. In p ...

2007

Biomechanical evaluation of intra-articular and extra-articular procedures in anterior cruciate ligament reconstruction: A finite element analysis

Dominique Pioletti, Perrine Saunier

Background. Intra-articular techniques (single and double bundles) are the most widely used procedures for the anterior cruciate lig- ament reconstruction. Lemaire introduced in 1967 the extra-articular techniques, and combined intra-articular and extra-ar ...

2007

Predicting sizing dependent bending rigidity of glass fibre bundles in sheet moulding compounds

Véronique Michaud, Emmanuelle Comte

The effect of sizing on bending rigidity in fibre bundles was investigated. Particular attention was paid to the effect of film formers and anti-static agents on the behaviour of glass fibre bundles under forced packing conditions. The bending rigidity of ...

2006

Void Formation And Transport During SMC Manufacturing: Effect Of The Glass Fibre Sizing

Véronique Michaud, Emmanuelle Comte

The present study investigates the origin of voids in sheet molding compounds (SMCs) sheets and their transport during the manufacturing steps. Paste mixing, impregnation, thickening, and molding have been performed with five different SMC sheets, one with ...

2006

Confocal microscopy using variable-focal-length microlenses and an optical fiber bundle

Liza Carol Andrea Dunbar, Toralf Scharf, Lin Yang

The use of variable-focal-length (VFL) microlenses can provide a way to axially scan the foci across a sample by electronic control. We demonstrate an approach to coupling VFL microlenses individually to a fiber bundle as a way to create a high-throughput ...

2005

Correlation between sizing formulation and compressive behaviour of concentrated glass bundle suspensions

Véronique Michaud, Emmanuelle Comte

The correlation between sizing formulation, bundle mechanical characteristics, and bundle-matrix static and dynamic interactions are investigated. Two glass-fiber sizing formulations are considered, one containing polyvinyl acetate (PVAc) and the other pol ...

2005

Reinforcement of single-walled carbon nanotube bundles by intertube bridging

Jürgen Brugger, László Forró, Andras Kis, Andrzej Kulik, Willy Benoit

During their production, single-walled carbon nanotubes form bundles. Owing to the weak van der Waals interaction that holds them together in the bundle, the tubes can easily slide on each other, resulting in a shear modulus comparable to that of graphite. ...

2004

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