Abstract
This paper focuses on the compression of fibre reinforcements during the processing of polymer composites, covering a range of fabrics, namely a plain weave, a twill, a satin and a non-crimped, stitch-bonded fabric. The compression of assemblies of fabrics has been studied in both dry and wet states where, in the latter case, the fabrics were impregnated with three alternative resins: a non-Newtonian polyester of relatively high viscosity, a non-Newtonian polyester of relatively low viscosity, and a Newtonian epoxy of equally low viscosity. Investigations of mechanical behaviour included the influence of compression speed, type of fabric and viscosity and type of resin. Microstructural studies of laminates produced under different degrees of maximum compression elucidated further the results of mechanical compression and provided data of average area porosity (resin-rich areas), area pore structure, average area voidage and voids for the different types of fabrics.
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