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Author(s): R. Keskin | I. Gocek | G. Ozkoc

Journal: Annals of the University of Oradea. Fascicle of Textiles, Leatherwork
ISSN 1843-813X

Volume: XIV;
Issue: 1;
Start page: 61;
Date: 2013;
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Keywords: glass fiber | composite | Polyamide 66 | Rule of Mixtures | tensile strength.

Fiber reinforced polymeric composites are being used due to their high strength and low weight advantages in many industries such as automotive and aerospace. Glass fibers, which have the same components as conventional glass, are widely used for reinforcing polymeric composites due to their high tensile strength values and relatively low costs. In this study, Polyamide66 (PA66) composites reinforced with glass fibers at 1 wt%, 10 wt%, 15 wt%, 20 wt%, 25 wt% and 30 wt% are produced in small dogbone shaped samples. The production of the fiber reinforced composites is done via melt compounding using laboratory scale twin screw extruder and injection molding machines respectively. The tensile strengths of the samples are tested and the theoretical tensile strength values of the composites are calculated according to the Rule of Mixtures for the longitudinal direction.There is a decrease in strain percentages for all fiber reinforced samples compared to 100% PA66 samples. The tensile strength values show an increase for fiber reinforcement values after 10 wt % glass fiber reinforcement; however there is a decrease in the tensile strength of the composite which has 1 wt% glass fiber. The measured tensile strengths of the composite samples show lower values than the results predicted from the Rule of Mixtures for longitudinal direction. The difference between measured and predicted results might be due to fiber orientation distributions in composites and weak interfacial bonding between matrix and fibers.
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