Simulations and Experiments on Low-Pressure Permeation of Fabrics: Part I - 3D Modeling of Unbalanced Fabric

Dungan, F. D.; Senoguz, M. T.; Sastry, Ann Marie; Faillaci, D. A.

doi:10.1177/002199801772662604

Cited by 2 publications

(3 citation statements)

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“…Often, experimental permeability testing is performed on thicker, multiple‐ply samples, rather than a single fabric layer (as in this case) to reduce the influence of wall effects and better represent a typical layup with a fiber volume fraction closer to 0.5. However, it is also well documented that variations in the way layers are stacked results in different degrees of “nesting,” and can significantly alter the permeability , in some cases by as much as an order of magnitude . Hence, a single‐ply test was chosen at this stage of the research to eliminate this effect, particularly in support of infusion modeling for single‐ply experiments .…”

Section: Discussionmentioning

confidence: 99%

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Permeability characterization of sheared carbon fiber textile preform

2016

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Fabric deformation alters its local permeability characteristics which, in turn, influences the resin infusion process. This work investigates the radial permeability test method of sheared carbon fiber textile reinforcement materials for the purposes of infusion modeling. A novel experimental approach is described, which utilizes a customized Matlab video processing code to track fluid flow and calculate permeability using data from the complete flow field. Results show principal permeability values, K1 and K2, to increase and decrease, respectively, from a near isotropic state as the fabric shear angle increases, yielding a K1/ K2 ratio of 3.74 at the maximum measured shear angle of 40°. Detailed statistical analysis revealed significant error for cases where fewer than 16 measurement directions were used for the permeability calculation, particularly in highly anisotropic samples. POLYM. COMPOS., 39:2287–2298, 2018. © 2016 Society of Plastics Engineers

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Section: Discussionmentioning

confidence: 99%

“…Permeability characterization can be performed experimentally, as is most common, or alternatively by simulation . The former is well established and widely practiced, though experimental results are not always repeatable .…”

Section: Introductionmentioning

confidence: 99%

Permeability characterization of sheared carbon fiber textile preform

2016

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“…Dungan et al and Senoguz et al demonstrated that, the permeability values could differ by a decimal order of magnitude for zero‐ and maximum nesting configurations of the laminate. Hoes et al applied the woven glass fiber fabrics with different levels of nesting for permeability measurement.…”

Section: Introductionmentioning

confidence: 99%

The effect of nesting on the in‐plane permeability of unidirectional fabrics in resin transfer molding

et al. 2014

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The nesting of layers has great effect on the permeability, which is a key parameter in resin transfer molding. In this article, two mathematical models were developed to predict the in-plane permeability of unidirectional fabrics with minimum and maximum nesting, respectively. For different zones of characteristic yarn arrangement in the unit cell, the local permeability was modeled as a function of geometrical yarn parameters. The global permeability was then modeled as a mixture of permeabilities of different zones with the electrical resistance analogy. A reasonably good agreement was found between the model predictions and experimental results. We also found that at the same fiber volume fraction, the results for Ky were two times larger with minimum nesting than with maximum nesting, whereas the results for Kx were a little lower with minimum nesting than maximum nesting. In addition, the differences between minimum and maximum nesting decreased with increasing fiber volume fraction. POLYM. COMPOS., 37:1695-1704, 2016

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Simulations and Experiments on Low-Pressure Permeation of Fabrics: Part I - 3D Modeling of Unbalanced Fabric

Cited by 2 publications

References 0 publications

Permeability characterization of sheared carbon fiber textile preform

Permeability characterization of sheared carbon fiber textile preform

The effect of nesting on the in‐plane permeability of unidirectional fabrics in resin transfer molding

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