Numerical approach for modelling across scales infusion-based processing of aircraft primary structures

Andriamananjara, Koloina; Chevalier, Loïc; Moulin, Nicolas; Bruchon, Julien; Liotier, Pierre‐Jacques; Drapier, Sylvain

doi:10.1063/1.5007998

Cited by 1 publication

(1 citation statement)

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“…This 'simple' characteristic, in itself, hides all the complexity of the multi-scale flows in composites [237,238], and has been very widely studied, for both in-plane [239][240][241][242], transverse permeabilities [243,244] and 3D flows [245,246], and in both stationary [247][248][249] and transient regimes [250][251][252] and is still an active field of experimental research [242,250] and numerical modelling [253][254][255]. Some intermediate numerical approaches investigate the effects of the fluid-fibre affinity across scales [256] in order to avoid complex and expensive experiments. They can be dedicated to the investigation of the effects of flow regimes which control the void formation and convection in LCM processes for instance [257][258][259][260], including in dual-scale architectures [257,261,262].…”

Section: Impregnation In Bio-based Compositesmentioning

confidence: 99%

Specific features of flax fibres used to manufacture composite materials

et al. 2018

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The use of composite materials reinforced by flax fibres has been increasing steadily over the last 20 years. These fibres show attractive mechanical properties but also some particularities (naturally limited length, presence of a lumen, fibres grouped in bundles in the plant, complex surface properties and composition). An analysis of the available literature indicates that the quality of the composite materials studied is not always optimal (high porosity, incomplete impregnation, heterogeneous microstructure, variable fibre orientation). This paper reviews published data on the specific nature of flax fibres with respect to manufacturing of biocomposites (defined here as polymers reinforced by natural fibres). All the important steps in the process which influence final properties are analyzed, including the plant development, retting, fibre extraction, fibre treatment, preform preparation, available manufacturing processes, the impregnation step, fibre cell wall changes during processing and fibre/matrix adhesion.

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