Experimental Study on Thrust Force and Torque on Post-drilling of Hybrid Glass/Kevlar FRP Laminates

As we know that composite like fiber-reinforced polymer (FRP) is a toughest material when reinforced with two or more different materials. They are used due to their superior performance in aircraft, automotive and defense applications. In order to join these components, the basic requirements to be satisfied are good quality holes achieved through proper drilling process. Drilling of glass–Kevlar FRP laminate is found to be one of the complicated conventional machining processes, to retain better hole quality, since glass fibers are used due to the presence of glass fiber in the material. In the present work, drilling mainly considers the machining parameters (i.e., feed, speed and drill material) and workpiece material thickness over the thrust force and torque followed by surface delamination. The above-mentioned parameters have been optimized with implication of Taguchi DOE method. Henceforth, a statistical attempt was considered in line with experiments to optimize the multiple responses yielded during glass–Kevlar FRP composite drilling. The machining parameters (viz. spindle speed and feed rate) are noticed to be improvised by considering various performance qualities, such as surface roughness of the workpiece followed by thrust force and torque as a primary factor. Thorough understanding of machining behavior must lead through less waste and defects. In order to study the significance of thrust force and torque, motionless and active analysis of the workpiece is done.