A percentage of natural fibers is used for developing a composite, the materials are quite increasing in recent trends, and they can be a potential replacement of synthetic fibers in the reinforcement phase of hybrid composite. In this research, the combination of natural fibers and synthetic fibers can be used as reinforcement, and epoxy polymer can be used as matrix material. The fibers of Kevlar and Napier grass are reinforced with epoxy matrix to develop a new composite by using conventional hand layup fabrication process and to quantify the effect of this hybrid composite laminate, with five different sequences following. To identify the mechanical properties of this hybrid composite through tensile, flexural, compression strength, impact strength, and hardness tests, among all five samples, sample A was given the maximum mechanical strength, such that the tensile strength is 210 MPa, flexural strength is 165 MPa, the impact energy absorption is 23 J, the average is 40% over the other samples, and, at the same time, the compression strength of sample E is 19 MPa, revealing the negative influence of hybrid composite. The SEM morphology was carried out to identify the failure mode of the hybrid composites.

In this paper, the Box-Behnken (BB) • The optimal levels of fabrication process parameters were identified using response surface graph and models.

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This paper presents preparation of unidirectional aligned agave sisalana variegata fiber-reinforced vinyl ester composite laminates and their mechanical properties such as tensile, shear, flexural and impact strength. Wet hand layup technique was used for the preparation of composites. Mechanical tests were carried out for different weight percentage of fiber by varying the number of layers. Mechanical properties were analyzed as a function of wt%. The maximum tensile, flexural, impact and shear strength was observed on a composite designated as D. But the maximum tensile and flexural modulus values were identified in a composite designated as E. Experimental results were compared with theoretical results such as the rule of mixture and Bowyer and Bader model. Bowyer and Bader model was able to predict the strength and modulus of the composites better than the rule of the mixture model. The comparison between experimental and predicted values was also done by the student t test.

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