Simulation Study on Longitudinal-torsional Ultrasonic Vibration Assisted Drilling of Carbon Fiber Reinforced Plastics
As to the carbon fiber reinforced plastics(CFRP),the drilling is prone to defects,the quality of the hole is difficult to guarantee and the efficiency is low.Based on Hashin criterion and PUCK criterion,the subprogram of constitutive model of carbon fiber reinforced plastics is constructed,and the three-dimensional solid finite element model of CFRP longi-tudinal torsional ultrasonic vibration assisted drilling is established.Compared with the change of thrust force in ordinary drilling process,and the influence of spindle speed,feed speed,frequency,amplitude,fiber layer angle and drill tip angle on the thrust force are analyzed.The results show that the thrust force increases with the increase of feed speed,frequency and drill tip angle,decreases with the increase of spindle speed,first decreases and then increases with the increase of ampli-tude,and first increases and then decreases with the increase of fiber lay angle.
CFRPlongitudinal-torsional ultrasonic assisted drillingfinite elementthrust force