Abstract

This study aims to determine the tensile strength of composite fibers of banana and pineapple. Mixed fiber composites use polyester resin as the binding matrix. The research sample was made by varying the fiber concentration with a matrix using mass fractions ((10:90)%, (20:80)%, (30:70)%, (40:60)% and (50:50)%). From the results of tensile strength testing, betel fiber composites with fiber (50: 50)% concentration is the best fiber because it has a maximum stress of 15.422 Mpa, elasticity modulus of 1350.5 MPa, elongation of 0.0402 mm and break point value of 0, 0048. This tensile strength value is greater than the standard SNI 03-2105 which is a minimum of 8 MPa and higher than previous researchers who use natural fiber.

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