Comprehensive Mathematical Model for the Prediction of Delamination Factor in Drilling of Multimaterial Stacks Using Boxbehnken Experimental Design

Using the Box Behnken experimental design, this research work gives a thorough mathematical model for predicting the effects of drilling parameters on the delamination factor during the drilling of CFRP/Al stacked composites. These composites are commonly utilized in aerospace applications and are frequently subjected to drilling for assembling purpose. The goal of this study is to predict the drilling parameters like drill type, drill diameter, feed rate and spindle speedthat affect the amount of delamination which occurs when drilling such composites. During the drilling operation, damage was noticed on the surface of the fabricated composite laminates. The experiments were conducted according to the Box Behnken experimental design and delamination response is measured by using an image processing software. It is concluded that among all the parameters, the feed rate influences more on the delamination factor.