Permeability of non-crimp fabric preforms

Loendersloot, Richard

doi:10.1533/9780857092533.2.166

Cited by 3 publications

(4 citation statements)

References 82 publications

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“…The test fluid used - Axson F18 Polyol Part A - is a non-curing component of a fast cast polyurethane and was chosen due to the previous work on the same test set-up of Loendersloot [2,8–10]. In order to visualize the fluid flow through the textile a black dye was added to the Polyol.…”

Section: Test Fluidmentioning

confidence: 99%

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Error Assessment in Permeability Measurement Using Radial Flow Method

Gommer

Lomov

Vandenbosche

et al. 2009

Advanced Composites Letters

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Permeability values measured on textile reinforcements with different methods or different test set-ups can differ significantly from each other. Even measurements preformed on the same test set-up can have a substantial scatter of measured permeability values. This paper discusses the sources of possible measurement errors for a radial flow set-up and their influence on the measured permeability results. Suggestions are given to improve the reliability of permeability measurements.

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Section: Test Fluidmentioning

confidence: 99%

“…2) describing the radial, two dimensional flow for a radial flow set-up, shown in Fig. 1 under a constant pressure in a porous medium which can be used to analyze permeability tests [2,3,8,9]: …”

Section: Introductionmentioning

confidence: 99%

Error Assessment in Permeability Measurement Using Radial Flow Method

Gommer

Lomov

Vandenbosche

et al. 2009

Advanced Composites Letters

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“…For example, quadriaxial NCF, analysts usually regarded the quadriaxial NCF as four layers of unidirectional tows stacks together with no further detailed description [21], which results in inaccurate approximations of the permeability. Actually, quadriaxial NCF, which makes up from not only unidirectional tows orientated from 0 • /90 • but also weft backing fiber piles orientated from +45 • /−45 • , It has been revealed that the compaction property, nesting behavior between layers as well as the permeability properties are quite different from the biaxial NCFs [28][29][30][31][32][33][34][35]. As the quadriaxial NCF is also a widely used reinforcement in LCM, it is of great significance to characterize the compaction and nesting behavior of the textile in the molding process and proposes an accurate permeability prediction model for the preforms.…”

Section: Introductionmentioning

confidence: 99%

Study of Compaction Properties and Permeability Prediction of Multilayered Quadriaxial Non-Crimp Fabric in Liquid Composite Molding Process

et al. 2020

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A systematic experimental study was performed to detect the compaction and permeability properties of multilayered biaxial and quadriaxial preforms under vacuum pressure. Compression response on ply level showed that the degree of nesting between quadriaxial NCF was more pronounced and the nesting deformation mechanism was affected by the interaction with stitch yarns. Owing to the meso-channels in the fibrous structure and the nesting between layers, the in-plane permeability of quadriaxial NCF did not follow an inverse proportion relationship with the fiber volume fraction. To predict the in-plane permeability of multilayered quadriaxial NCFs, unit cell models at a high level of geometrical details were built, including local variations in yarn cross-sections and the nesting deformation between layers. Numerical methods were implemented, and the prediction results were in very good agreement with the experimental data. Besides, the major contributing parameters to the enhancement of the in-plane permeabilities were identified by investigating the correlation between permeability and structural parameters of quadriaxial NCF. The modeling methodology and the principles established can be applied to the design of the quadriaxial NCF fabrics, where the permeability enhancement was evidenced.

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“…due to tool deflection) and the permeability values. Permeability measurements typically resulted in large scatter [47,48] in the data obtained by various institutes on similar reinforcements.…”

Section: The Pastmentioning

confidence: 99%

Composites Forming

Boisse¹,

Akkerman²,

Cao³

et al.

Advances in Material Forming

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The strong development of composite materials in particular in aeronautics leads to a demand for knowledge and simulation codes concerning composites forming. The mini-symposia developed on this theme within the ESAFORM conference are a privileged framework for the researchers in this field to communicate and to exchange ideas. This paper gives a progress report on the advancements achieved during these ten last years and on the research prospects in the various fields of composite material forming.

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Permeability of non-crimp fabric preforms

Cited by 3 publications

References 82 publications

Error Assessment in Permeability Measurement Using Radial Flow Method

Error Assessment in Permeability Measurement Using Radial Flow Method

Study of Compaction Properties and Permeability Prediction of Multilayered Quadriaxial Non-Crimp Fabric in Liquid Composite Molding Process

Composites Forming

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