On statistics of permeability in constant injection pressure conditions at different fibre volume fractions

Abstract

This paper presents the determination of the unsaturated permeability of a carbon fibre woven fabric using an experimental method of constant injection pressure and radial flow. Two effects in permeability measurement are reported: the error introduced by assuming constant injection pressure and the evolution of permeability dispersion with volume fraction. For the first, a simple approach that uses a set of values instead of just one to define the injection pressure is proposed. For the second, results showed a reduction in the dispersion with higher fibre volume fractions, which is believed to be due to the reduction of the variability of the size of the pores of the reinforcement.

Keywords:

• PERMEABILITY
• CARBON FIBRE
• FABRICS/TEXTILES
• RHEOLOGICAL PROPERTIES
• STATISTICAL PROPERTIES/METHODS
• RESIN TRANSFER MOULDING