Abstract
In the present study fiber hybrid (bamboo fiber and Musa acuminata stem fibers (MASF) were reinforced polyester composite, for enhancing mechanical properties. The natural fibers composite has gained its importance due to its low cost, substitute for artificial fiber, low price, able to reduce sound, environmentally friendly, has a low density, good fit and ability to absorb impact energy. It’s possible to use it as a vehicle accessory such as a rear bumper vehicle. This study aims to investigate the tensile stress-strain, elasticity modulus and the microstructure of fracture of polyester fiberglass composite reinforced bamboo fiber and MASF hybrid. Polyester matrix type 157 is used BQTN and G3253T, MEKPO catalyst. The mechanical properties test was carried out by universal testing machine (UTM) test instrument, observing the microstructure of the occurrence of fracture by using scanning electron microscope (SEM). The test specimens produced the vacuum infusion method. The results of this study indicate that the addition of more MASF and the outer layer content can increase the tensile strength, elasticity modulus of polyester composites reinforced MASF with woven, random arrangement is better than that of polyester composites reinforced bamboo fiber. So that in the manufacture of polyester composites reinforced hybrid fiber the use of more MASF than bamboo fiber can provide better tensile strength and elasticity modulus. The configuration with the outer MASF layer can also increase the value of tensile strength, elasticity modulus on the specimen compared to the configuration with bamboo fiber outside. The microstructure of fracture for fiber for each configuration of MASF content there are long fibers and also in bamboo fibers there are fibers that are pulled out. The diameter of the bamboo fiber reinforcement is larger so that the load transfer is not as effective as MASF.
Highlights
The automotive industry tends to use composite materials for its exteriors such as bumpers, extenders and followers
The results indicate that some mechanical properties such as tensile strength, Young’s modulus, flexural strength and flexural modulus are similar to glass mat thermoplastic (GMT), but impact strength is still low, and shows the potential for utilization of hybrid natural fiber in some car structural components such as bumper beams
This study aims to determine the mechanical properties of polyester composite reinforced hybrid fibers, for the feasibility of these composites as an alternative solution to the replacement material for Multi-Purpose Vehicle (MPV) bumpers
Summary
The automotive industry tends to use composite materials for its exteriors such as bumpers, extenders and followers. The reasons are composite materials, low density, light weight and corrosion resistance. The polyester matrices composite reinforced natural fibers present a great potential application in the automobile industry, especially in the bumper of automobiles, bus and trucks. The future perspective for the use of natural fibers is very good in other areas. Use of natural fibers as, coconut, sisal, rami, sugar-cane pulp, jute and pineapple as reinforcement in polymeric material had an accelerated growth. They are source of renewable natural resource [1]
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