Influence of Thrust, Torque Responsible for Delamination in drilling of Glass Fabric Epoxy Rigid polyurethane foam sandwich hybrid composite
Glass fabric sandwich composites are potentially growing materials which satisfies the low strength to weight fraction, thermal conductivity, high strength and long operational lifetime required for key engineering applications especially in the field of Mechanical and Aerospace structures. With their wide range of application, their manufacturing and machinability characteristics are interesting to investigate. Drilling is one of the prime manufacturing processes used in assembly lines of components for fastening and joining two components. In this study, Glass Fabric Epoxy Rigid polyurethane foam sandwich hybrid composite is drilled in Arix VMC 100 CNC drilling machine using High Speed Steel (HSS) drill bit of three different diameters of 6 mm, 8 mm and 10 mm. A L 9 orthogonal array is setup to investigate the result. Two main parameters that contribute to delamination are thrust and torque. Thus in this investigation, thrust and torque responsible for the effect of delamination and hole quality is studied experimentally. Scanning Electron Microscope (SEM) images are taken for the drilled hole laminate to support the result.