Influence of the micro-structure on saturated transverse flow in fibre arrays

Gommer, Frank and Endruweit, Andreas and Long, Andrew C. (2018) Influence of the micro-structure on saturated transverse flow in fibre arrays. Journal of Composite Materials, 51 (18). pp. 2463-2475. ISSN 1530-793X

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Abstract

This study analyses the influence of the random filament arrangement in fibre bundles on the resin flow behaviour. Transverse steady-state resin flow which occurs behind a liquid resin flow front was simulated numerically through statistically equivalent micro-structures at high fibre volume fractions, Vf >0.6, as observed in fibre bundles. The need of applying a minimum gap distance between neighbouring filaments was overcome by automated local mesh refinement. The derived permeability values showed significant scatter. Convergence of these values was determined at a ratio of flow length to filament radius greater than 20 for all three analysed fibre volume fractions. Mean permeabilities were between 6 and 10 times lower than those predicted for a hexagonal fibre array. A statistical model is proposed which is able to predict the scatter of observed permeabilities based on simple micro-structural descriptors.

Item Type: Article
Keywords: Fibres; Microstructures; Numerical analysis; Resin flow
Schools/Departments: University of Nottingham, UK > Faculty of Engineering > Department of Mechanical, Materials and Manufacturing Engineering
Identification Number: https://doi.org/10.1177/0021998317747954
Depositing User: Eprints, Support
Date Deposited: 24 Nov 2017 11:23
Last Modified: 13 Aug 2018 09:34
URI: http://eprints.nottingham.ac.uk/id/eprint/48367

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