An analytical method for predicting the fluctuation of thrust force during drilling of unidirectional carbon fiber reinforced plastics

Abstract

This paper devotes to predicting and analyzing the fluctuation of the thrust force during drilling of unidirectional carbon fiber reinforced plastics (UD-CFRPs). The fluctuation properties could be evaluated by the average value, maximum value, minimum value, change frequency and the amplitude of thrust force. Firstly, an orthogonal cutting model is introduced, and the model is modified in order to reveal how the drilling parameters affect the fluctuation. Secondly, the cutting lips are assumed to conduct orthogonal cutting, and the thrust force generated on cutting lips is calculated by using the orthogonal cutting model. Thirdly, the variable parameter, which leads to the fluctuation of thrust force, involved in the analytical model is analyzed separately. Lastly, experiments were conducted to determine the coefficients and testify the model. The comparison between the theoretical values and the experimental results prove that the analytical model can predict the fluctuation of thrust force well.

Tool geometry based prediction of critical thrust force while drilling carbon fiber reinforced polymers

“…The same model is used in this study to investigate the influence of different PCD drill geometries on drilling forces and torques. Meng et al [12] proposed a new model by considering the force fluctuations due to varying fiber directions during the drilling process. Sadek et al [13] used a mechanistic thrust force and torque model to predict delamination while drilling CFRPs.…”

Investigation on thrust force in rotary ultrasonic drilling of CFRP/aluminum stacks

“…For composites with orthogonal-woven structure, the equivalent fiber orientation θ' can be obtained as shown in Meng et al. 30 …”

Multi-objective Optimization Using Neural Network, Differential Evolution, and Teaching Learning Based Optimization in Drilling Process of Glass Fiber Reinforced Polymer

“…This happens because with the low f r, the thickness of uncut chip thickness will be small and the relief angle will increase, it can cause the thrust force working on the workpiece to decrease. And in order to gain a low value of torque, the f r needs to be set on a small value to minimize the cross-section of the chips and the effective clearance angle will increase [24,25].…”