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Evaluation of Mechanical Properties of Coir- Sisal Reinforced Hybrid Composites Using Isophthalic Polyester Resin

C.Chaithanyan, H.Venkatasubramanian, Dr. S.Raghuraman, T. Panneerselvam

Composite materials have occupied major part in current era due to its light weight, good stiffness, high specific strength and flexible nature. Due to large availability of naturally occurring fibers and their capability to hybridize with glass fiber, the applications of these fibers vary according to purpose. This paper deals with preparation and investigation ofhybrid composites of natural fibers in isophthalic polyester resin.Natural fibers used here are sisal and coir fibers which are mixed with isophthalic polyester in volume fraction basis of 0.4 & 0.5. This composite is manufactured using hand layup process. Mechanical properties of each composite are determined through tensile, flexural, impact tests. The tensile strength of sisal-glass composite is found to be better than the coir-glass composite. The flexural strength and impact strength of sisal-coir-glass hybrid composite is found to be better than the remaining two combinations of composites.