Critical Thrust Force Forecasting for Drilling Exit Delamination of Carbon Fibre Reinforced Plastics

Exit delamination is excessive drilling thrust force. Therefore, it is necessary to investigate the critical thrust force which cause exit delamination when carbon fibre reinforced plastics (CRFP) is drilled. According to the linear elastic fracture mechanics, the mechanics of composite material and the classical thin plate bending theory, a common theoretical model of the critical drilling thrust force for CFRP plates is established. Compared with the experimental data of previous studies, the results show that the theoretical values agree well with the experimental values. This model can be used to forecast the critical thrust force for the drilling-induced delamination of CFRP.