Abstract
This paper investigates the effect of filler content on the mechanical properties of cotton fiber (CF) on the CF/PP and CF/PVC composites under quasi-static loading. For this purpose, experimental tensile tests were carried out on dog-bone specimens, cut out from hot and cold press molded square plates of different fiber weight contents. The results obtained show that the filler content appears to have a strong influence on mechanical energy absorption, and failure characteristics. It was also found that the stiffness for both sets of material increases with the addition of filler. On the other hand, the ductility for both sets of the material increases with the addition of filler. The microscopic morphology study indicates that CF/PP possesses a glossy surface appearance compared to CF/PVC, which possesses a porous surface. Micro-scale damage characteristics from tensile tests indicate that material experienced shear failure, matrix cracking, fiber breakage, fiber fracture, and fiber pullout. The phenomenon of matrix crazing experienced by CF/PP composites was also observed.
Highlights
The use of fiber-reinforced polymers (FRP) in the aerospace and automotive industry is constantly increasing because of their inherent advantages compared to traditional materials
As for poly(vinyl chloride) (PVC)/cotton fiber (CF) composites, the results show a decreasing tensile strength to the point of 30% of filler addition before it increases slightly for the remaining percentage of filler addition
Polypropylene/cotton fiber and poly(vinyl chloride)/cotton fiber composites samples were fabricated and tensile tested throughout the work
Summary
The use of fiber-reinforced polymers (FRP) in the aerospace and automotive industry is constantly increasing because of their inherent advantages compared to traditional materials. The increase in usage is reported in the aforementioned applications and in many other technical applications, especially where high strength and stiffness are demanded but with low component weight [1,2]. An alternative option is to construct composites from materials made of renewable resources that involve economically and ecologically acceptable manufacturing technologies. The use of natural fibers, which has recently attracted increased attention. In addition to their environmental benefits, the potential advantages of natural fibers are the plentiful supply of raw materials from renewable resources rather than from fossil sources and their low cost
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