Investigation of Aramid Fiber, Glass Fiber, and Boron Nitride Nanoplate ( BNNP ) Structures in Terms of Hybridization, Mechanical, Hardness, and Drillability

In this study, four different composite structures (1‐E glass fiber reinforced laminated polymer composite, 2‐aramid fiber reinforced laminated polymer composite, 3‐E glass/aramid fiber reinforced laminated hybrid polymer composite, 4‐E glass/aramid fiber reinforced nano‐added (boron nitride nanoplates (BNNPs)) laminated hybrid polymer nanocomposite) were produced. Tensile strength, elasticity modulus, and unit strain changes were determined under uniaxial constant jaw speed. The Shore D hardness properties were also evaluated by measuring from both the surfaces and thickness aspects. Drilling experiments were carried out using the same diameter HSS bits, carbide bits, and HSS end mill at different processing parameters. Drillability was determined depending on the input and output delamination factors and thrust force. Four different composite structures showed different strength and % elongation depending on the plate cutting directions. Up to 10 times elongation was observed in 450 test specimens. In the same test specimens, the strength properties were found to be 1/3 weaker and the elastic modulus was 1/5 weaker. While the nano‐additive gave successful results in surface hardness, it caused a weak hardness among the layers in the thickness direction. In general, end mill gave more successful results in the drilling process compared to other drilling bits.