FEA of Drilling of CFRP Reinforced with Different Percentage of SI3N4

The current study deals with the drilling of composites based on the taguchi's L27 experimental orthogonal array. Considering the carbon fiber reinforced composite with epoxy resin, silicon nitride (Si3N4) is added to test its influence on the drilling. The experimental studies are carried out on specimens with 0 %, 6 % and 10 % silicon nitride. The process parameters of speed, feed, and diameter of drill bit are varied and results are tabulated in the tables. In general surface roughness, circularity, cylindricity and delamination factor are minimum for a minimum value of thrust force while drilling. Therefore, the thrust force is measured for three different percentage of silicon nitride addition. It is observed that with increased silicon nitride parentage, there is decreased thrust force generated resulting in minimum delamination. In addition, modal analysis and transient structural analysis are carried out to determine the natural frequencies and mode shapes and to investigate the maximum stress and deformation to validate the thrust force and delamination factors.