Publications associées à Units of textile measurement

Electroadhesive gripping system and method for gripping an object

Herbert Shea, Vito Cacucciolo, Krishna Manaswi Digumarti

An electroadhesive gripping system and a method for gripping and manipulating an object are disclosed. The invention provides a novel approach particularly useful to pick fabrics or otherwise flat and flexible objects including a method relying on electroa ...

2023

Multi-scale characterization and modeling of notched strength and translaminar fracture in hybrid thin-ply composites based on different carbon fiber grades

Guillaume Clément Broggi

Owing to their high specific stiffness and strength, Carbon Fiber Reinforced Composites (CFRP) are ideal candidates for the development of lightweight high-performance structures. Within this family, thin-ply composites allow for wider design freedom and p ...

EPFL2023

Benchmark exercise on image-based permeability determination of engineering textiles: Microscale predictions

Véronique Michaud, Baris Çaglar, Guillaume Clément Broggi

Permeability measurements of engineering textiles exhibit large variability as no standardization method currently exists; numerical permeability prediction is thus an attractive alternative. It has all advantages of virtual material characterization, incl ...

2023

Kinematic and mechanical response of dry woven fabrics in through-thickness compression: Virtual fiber modeling with mesh overlay technique and experimental validation

Véronique Michaud, Baris Çaglar, Lode Geeraard Daelemans

The through-thickness compressive behavior of fabric reinforcements is crucial in liquid composite molding manufacturing processes. Predictive simulations of the compressive response are thus necessary to enable a virtual processing workflow. These are com ...

2021

3D spacers enhance flow kinetics in resin transfer molding with woven fabrics

Véronique Michaud, Baris Çaglar, Damiano Salvatori

Impregnation time in Resin Transfer Molding (RTM) is directly proportional to resin viscosity and inversely proportional to fabric permeability, limiting the use of high-viscosity resins with conventional reinforcements. In this study, we show how to reduc ...

2019

Experimental research on Textile Reinforced Concrete for the development of design tools

Aurelio Muttoni, Miguel Fernández Ruiz, Patrick Lorenzo Valeri

Due to the limited construction experiences as well as to the absence of clear and consolidated design provisions for design of Textile Reinforced Concrete (TRC), the application of this material in practice is still very limited. In this paper, the result ...

2018

All-fiber hybrid piezoelectric-enhanced triboelectric nanogenerator for wearable gesture monitoring

Jürgen Brugger, Ya Wang, Xiaohang Zhang, Xiao Sheng Zhang, Yinben Guo

With the increasing potential of smart clothing, the demand for generating energy directly in the tissue fibers has prompted for increased research in the field of energy harvesters based on wearable nanogenerators. Current challenges remain in the combina ...

Elsevier2018

Strategies for faster impregnation in melt thermoplastic resin transfer molding process

Damiano Salvatori

Continuous fiber thermoplastic composites are potential substitutes of steel in structural automotive components, since they combine fiber strength and rigidity with ductility, potential recyclability and low density of the thermoplastic (TP) matrix. Resin ...

EPFL2018

In-plane permeability distribution mapping of isotropic mats using flow front detection

Véronique Michaud, Baris Çaglar, Damiano Salvatori

In-plane permeability of textile fabrics is often characterized by one-dimensional rectilinear flow experiments, displaying limitations related to potential race-tracking effects and the need to run experiments at several fiber volume fractions. We propose ...

2018

Permeability of textile fabrics with spherical inclusions

Véronique Michaud, Baris Çaglar

We investigated the effect of rigid spherical inclusions such as microcapsules and fillers on the permeability of fabrics by using glass beads as model inclusions. Beads with a range of diameters (40-800 mu m) and volume fractions (2.5-10%) were sieved bet ...

Elsevier2017

Dynamic mechanical properties of epoxy/flax fibre composites

Pierre-Etienne Bourban, Fabien Duc

The mechanical and damping properties were measured for unidirectional, 0/90 and twill 2/2 flax fibre (FF) composites containing 40 vol% of fibres in an epoxy matrix. All composites were processed by resin transfer moulding. The influence of the impregnati ...

Sage Publications Ltd2014

Water retention behaviour and microstructural evolution of MX-80 granular bentonite during wetting and drying cycles

Lyesse Laloui, Alessio Ferrari, Ali Seiphoori

MX-80 bentonite used in engineered barrier systems would be subjected to wetting and drying cycles. To assess the response of the material under such circumstances, a comprehensive experimental characterisation of the water retention behaviour of compacted ...

2014

Packing and permeability properties of E-glass fibre reinforcements functionalised with capsules for self-healing applications

Véronique Michaud, Erica Manfredi

In the framework of the development of capsule-based self-healing composites, this work investigates whether the capsules containing self-healing agents, dispersed on dry glass fibre reinforcements, influence their packing and longitudinal and transverse p ...

Elsevier2014

Experimental determination of the permeability of engineering textiles: Benchmark II

Véronique Michaud, Eliazar Rodriguez Garcia, Suzanne Godelieve Alphonsine Verheyden, Benoît Louis

In this second international permeability benchmark, the in-plane permeability values of a carbon fabric were studied by twelve research groups worldwide. One participant also investigated the deformation of the tested carbon fabric. The aim of this work w ...

Elsevier2014

Arrested fluid-fluid phase separation in depletion systems: Implications of the characteristic length on gel formation and rheology

Suliana Manley

We investigate the structural, dynamical, and rheological properties of colloid-polymer mixtures in a volume fraction range of φ=0.15-0.35. Our systems are density-matched, residual charges are screened, and the polymer-colloid size ratio is ∼0.37. For the ...

American Institute of Physics2010

Assessment of semi-impregnated fabrics in honeycomb sandwich structures

Véronique Michaud

Semi-impregnated fabrics, or semipregs, are fabrics alternating dry and resin impregnated areas along the fibre bed surface. Due to their increased initial through thickness permeability to gas flow, these could constitute an alternative to prepreg in the ...

2010

Optimisation of low pressure processing for honeycomb sandwich structures

Sandra Sequeira Lopes Tavares

Vacuum-bag processing of honeycomb sandwich structures faces particular challenges compared to autoclave sandwich fabrication for aeronautics, a consequence of using, at the most, atmospheric pressure for their manufacturing. In particular, the adhesion of ...

EPFL2009

Capillary phenomena in liquid composite moulding

Véronique Michaud

In liquid composite moulding, capillary phenomena take place as the fibre/air interface is progressively replaced by the fibre/resin interface. These effects are often neglected when computing the flow front progression into the fibre preform, because the ...

2007

3D morphology of cell cultures: a quantitative approach using micrometer synchrotron light tomography

Jeffrey Alan Hubbell, Randoald Müller

Current issues in both tissue engineering and cell biology deal with cell behavior extensively in 3D. Here, we explore synchrotron radiation micro-computed tomography as a tool for morphological characterization of such 3D cellular constructs, providing mi ...

2005

Identification par recalage modal et fréquentiel des propriétés constitutives de coques en matériaux composites

Joël Cugnoni

Fibre-reinforced composites are being increasingly used as alternatives for conventional materials primarily because of their high strength, specific stiffness, light weight and adjustable properties. However, before using this type of material with confid ...

EPFL2005