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Usman Ahmed,Asra Tariq,Yasir Nawab,Khubab Shaker,Zubair Khaliq,Muhammad Umair 한국섬유공학회 2020 Fibers and polymers Vol.21 No.6
The conventional woven fabrics (plain, twill, satin, etc.) have yarn undulations, that may lead to the fibre breakageand loss of mechanical strength. This problem was resolved using unidirectional woven structures having straight yarns, butthey provide strength in one direction only. A possible solution is the use of biaxial fabric having yarns at ±45 o asreinforcement, but its fabrication cost is too high. The current study focussed on the development of a composite materialusing conventional fabrics having comparable properties with biaxial fabric composites. Three different reinforcements(plain, twill and unidirectional) were prepared using glass fibre. For composite fabrication, plies were cut, stacked at ±45 oand infused with unsaturated polyester resin to produce a composite equivalent to the biaxial composite. Similarly, thestitched composites were also fabricated by stitching the similar stack (using chain stitch class 101) before impregnating withresin. Laminated composites from biaxial fabric (both stitched and unstitched) were also produced for comparison. All thesecomposites were characterised for tensile and impact properties. The tensile strength of stitched unidirectional compositeswas higher as compared to the other woven and biaxial structures. Similarly, the impact strength was also higher for stitchedunidirectional composite. Hence, the ±45 o stacked unidirectional composite may be used as a potential replacement of biaxialcomposite.
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