Abstract
Existing permeability measurement techniques are based upon pressure driven flow through fibrous reinforcing materials. An innovative method is presented here utilising compression driven flow, which allows for continuous measurement of permeability over wide fibre volume fraction ranges, in a single efficient test. The initial study has been limited to isotropic reinforcements, obtained permeability data being compared with values measured using a more conventional method. Data has been collected from two styles of random mat, volume fraction varied from 20 to 50% in each test. Comparison between the two methods is very promising, validating further study and extension of this new technique. Larger errors have been noted at higher volume fractions, this effect being related to increasing mold clamping forces, and a subsequent translational deflection of the upper platen.
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