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The study aims to evaluate the roundness error in drilling of Novel Hybrid glass/luffa/epoxy composites by addition of silica nanoparticles in comparison with plain luffa natural fiber composites. he plain luffa natural fiber composite reinforced with epoxy/glass fiber taken as control group(N=20). The luffa/glass material is reinforced along with an epoxy matrix mixed by addition of silica nanoparticles filler taken as an experimental group(N=20). The control group and experimental group are conducted by using a hand lay-up method. Roundness in drilling is conducted as per ASTM standards. Roundness error during drilling was calculated by using the imageJ software and the damaged area was compared for both groups. The G power test was used to assess the number of samples in each group. Glass fiber with plain luffa without filler epoxy composite laminate exhibited a decrease of 64.66% in damage area than the 2% volume fraction of silica nanoparticles luffa/glass laminates. The significant value of P is 0.043 (<0.05). Within the limits of study, glass fiber/luffa fiber reinforced with epoxy material without filler exhibits a significant reduction in the roundness error during the drilling process. [ABSTRACT FROM AUTHOR]

The design engineers are vigilant about weight reduction without compromising on the structural strength. The composite is a lightweight material that has good structural properties, and it is widely used as it can be tailored based on the requirements. Fabric-reinforced polymer composites have a wide applicationin engineering because of its high specific strength. The fabric serves as reinforcement, and it may be synthetic or natural. Synthetic fibers are not only strong but also lightweight. In the present work, fabrication and experimental investigation on synthetic fiber-based polymer composites are carried out. Initially, bidirectional carbon, Kevlar, and glass laminates are fabricated using hand lay-up and vacuum bagging methods. Then, hybrid laminate made up of carbon-Kevlar and carbon-glass laminates are fabricated, and experimental investigationis conducted to study their mechanical behavior. The comparative studies on the laminates are carried out and theobtained results are quite interesting. [ABSTRACT FROM AUTHOR]