Characteristics of Tensile And Impact Strength Of Fiber-owder Hybrid Composite Subjected With Uniaxial Preloading

Abstract

Hybrid Composite is a composite consisting of two or more materials combined at a macroscopic level. The Hybrid Composite consists of inorganic and organic materials. It is an alternative material that has special properties and can replace metals. Uniaxial preloading which was applied to reinforcement fibers before curing process to produce compressive residual stress. This study aimed to obtained the characteristics of the tensile and impact strength of hybrid composite subjected with uniaxial preloading on reinforcement fiber. The hybrid composite consists of C-Glass fiberglass woven roving, coconut shell powder and vinylester resin. The composite manufacturing method in this study was the hand lay up. The uniaxial preloadings were 0N, 50N, 100N, 150N, and 200N. Tensile test was based on ASTM D 3039 standard while impact test based on ASTM D6110-04. The experimental results shown that the application of uniaxial preloading on reinforcing fibers increased the tensile strength and impact strength of hybrid composites. The lowest tensile strength of hybrid composites 71.58N/mm2 occurred in the uniaxial preloading 0N or without preloading. The highest tensile strength 106.05 N/mm2 occurred in uniaxial preloading 200N. Hybrid composite specimens without uniaxial preloading had the lowest impact strength of 1.34 J/mm2 and the highest impact strength of hybrid composites of 15.09 J/mm2 occurred in uniaxial preloading 200N.