Permeability of sheared woven flax fibres reinforcements; permeability measurements of the orthotropic behaviour

Abstract : Introduction With the increased use of Liquid Composite Moulding (LCM) processes in the aeronautical and automotive industries, the complexity of the parts and quality requirements have increased tremendously. The development of fabric forming models and the refinement of mould filling simulations, calls for improved material models to achieve the predictions expected by the industry. Accurate permeability data of reinforcing materials is essential in order to conduct LCM simulations and design the manufacturing process more efficiently [1]. Permeability is predominantly a function of the reinforcement architecture and its fibre volume fraction, both of which are affected by textile deformation when used to manufacture complex 3D parts. The push for more sustainable materials either biodegradable or fully recyclable has also pushed the composite industry to look increasingly at bio-based reinforcements and resins. The bio-based reinforcement being formed from the assembly of short fibrils of variable geometry into continuous strands have very different forming and permeability properties than traditional composite reinforcements formed by assembling continuous fibre with smooth geometry.
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Pierre-Jacques Liotier, Quentin Govignon, Elinor Swery, Sylvain Drapier, Simon Bickerton. Permeability of sheared woven flax fibres reinforcements; permeability measurements of the orthotropic behaviour. 12th International Conference on Flow Processes in Composite Materials, Jul 2014, Twente, Netherlands. ⟨hal-02070617⟩

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