OPTIMIZATION OF DRILLING PARAMETERS IN GFRP USING GREY RELATIONAL ANALYSIS WITH KEVLAR DRILL BIT

Drilling has been acknowledged to be one of the key machining operations done on composite laminates. During drilling many defects such as delamination, splintering, swelling, burrs, fiber pullout etc. arise. Among these delamination stands out. This paper promulgates an experimental investigation on drilling-induced delamination of GFRP laminates using Kevlar drill bit.Taguchi grey relation approach based on multiple parameters has been used to optimize the results. Delamination has been quantified with the help of two dimensional delamination factor, similarly thrust force and torque are measured and its impact on delamination has been reviewed.