he influence of fibre aspect ratio on multilive feed ;lass fibre/nylon 6,6 composites has been studied using wo model materials based on extrusion and pultrusion ompounding. Characterisation of the microstructure of hese compounds revealed that the fibre orientation listribution and volume fraction were similar between he compounds, but the fibre length distributions were bund to be different, with the compound produced by lultrusion compounding having the larger mean fibre ispect ratio. The mechanical performance of the two impounds was evaluated in terms of stiffness and trength across a wide range of service conditions using 10th tensile dilatometry and creep deformation. Under ill test conditions, an improved level of mechanical »erformance was seen for compounds with improved nean fibre aspect ratio. Modelling these materials in erms of stiffness and strength also revealed that mproved performance is expected with an improved ibre aspect ratio.
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