Drilling Response of Carbon Fabric/Solid Lubricant Filler/Epoxy Hybrid Composites: An Experimental Investigation

Carbon-fiber-reinforced epoxy composite (CEC) has gained widespread acceptance as a structural material in various applications. Drilled holes are essential for assembling components. Reducing drilling-induced damage and temperature effects is crucial improved surface quality integrity of the drilled composite. In present work, drilling experiments were conducted on CEC, hexagonal-boron nitride (h-BN) dispersed molybdenum disulfide (MoS2) CEC at three different levels spindle speed, feed, drill diameter using solid carbide twist drills. The filler concentrations used this study 4, 6, 8 wt%. Analysis variance (ANOVA) was to determine significance input factors (feed, diameter, concentration) responses such thrust force, temperature, arithmetic mean roughness (Ra), push-out delamination factor (DFexit). average Ra, DFexit MoS2 reduced by 24.7, 46.5, 11.3%, respectively, when compared neat CEC. h-BN 25.2, 40.9, 13.2%, lubricating properties high thermal conductivity added responsible lower hole finish. resistance filler-loaded due strengthening matrix fiber–matrix interface. Scanning electron microscopy (SEM) examine morphology surface. speed 5500 rpm, feed 0.03 mm.rev−1, loading 4 wt% produced minimum Ra DFexit. response method (RSM) applied parameters based multi-response optimum criteria.