Finite Element Simulation Analysis of Cf/SiC Composites in Longitudinal Ultrasonic Vibration Drilling
Cf/SiC composites have excellent properties such as low density,high strength ratio,high hardness,good corrosion resistance and good thermal stability,and are widely used in aerospace,aviation and energy fields.However,due to its anisotropy,non-uniformity and high hardness,problems are obvious such as large axial force and serious tool wear in the drilling process.Based on the hypnosis that longitudinal ultrasonic drilling can significantly reduce the axial forces of the drilling,this study uses the Abaqus finite element simulation software to establish a longitudinal ultrasonic drilling model,the material model is composed of matrix,fiber and interface.and it also investigates the influence of ultrasonic amplitude on axial force.The results show that at the speed of 6000r/min and the feed of 40mm/min,with the increase of amplitude,the axial force decreases first and then increases compared with ordinary drilling,and the axial force is the smallest at the amplitude of 6 μm.
carbon fiber-reinforced silicon carbide matrix compositesfinite element simulationamplitudeaxial force