Permeability properties of reinforcements in composites
V. Michaud, Ecole Polytechnique Fédérale de Lausanne (EPFL), Switzerland
Abstract:
Permeability is defined from the equations of fluid flow through porous media. Modelling of the saturated permeability tensor is then presented using a historical perspective, going from the first geometrical models developed in soil science, to recent unit-cell models based on a precise description of composite reinforcements. Deviations from the saturated flow models are then presented, discussing in particular the effect of capillarity. Finally, experimental methods to measure permeability are described and discussed.
Key words
permeability
saturation
Darcy’s law
liquid composite moulding
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