Paper Title
Drill Performance Study on A CFRP Rohacell Sandwich Structure

To investigate the effect of drilling on a CFRP rohacell sandwich composite structure using three different drill bits by varying the parameters such as speed and feed.A composite work material has been outsourced.The variation of responses such as thrust force,delamination factor and torque were analysed along with some qualitative responses such as hole quality,core damage and interlaminar uncut fibers.Considering all the responses,it was observed that core drill is best suitable for drilling operation in a CFRP rohacell composite Keywords - CFRP Rohacell , Delamination , Interlaminar uncut , trepanning , core damage.