Evaluation and analysis of delamination during drilling on Sisal-Glass Fibres Reinforced Polymer

•New hybrid composite (S-GFRP) has been successfully synthesized.•Feed rate seems to be the most significant parameter on the peel-up delamination under drilling.•The optimized drilling parameters for the minimum delamination have been found.•Main effect plots and contour plots have verified the optimal drilling parameters.•Results obtained by profile projector and Image processing have consistency. Now-a-days, composite materials with reinforcement have a wide range of industrial applications such as automobile, aerospace and marine because of its high strength-to-weight ratio and high stiffness to weight ratio. In composite parts assembly, delamination is being a critical issue during drilling operation due to its anisotropy property. The present work aims to study the effect of delamination during drilling on Sisal-Glass Fibres Reinforced Polymer (S-GFRP) material. The experiments were planned with Taguchi’s approach to determine the delamination. The damaged zone around the drilled holes was measured using a profile projector and subsequently analyzed through ImageJ software. Signal-to-noise (S/N) ratio was used to analyze and optimize the working parameters for minimum delamination. The delamination determined by the two different approaches, namely profile projector and image processing has consistent results and has good agreement with each other.