A study on monitoring the drilling of polymeric nanocomposite laminates using acoustic emission

The aim of this article is to monitor process induced defects such as delamination while drilling carbon fiber reinforced plastic nanocomposite laminates using acoustic emission. The carbon fiber reinforced plastic nanocomposite laminates were prepared and drilling experiments were carried out in the laminates using solid carbide drills of diameter 6mm. The input parameters considered were cutting speed, feed, and wt% carbon nanofiber present in carbon fiber reinforced plastic nanocomposite laminates. A three level test for each parameter was conducted using L-27 orthogonal array. The output response measured were acoustic emission characteristics such as root mean square of the signal, rise time, counts, energy, duration, peak amplitude, counts to peak, hits, average frequency, delamination, thrust force, and torque. The monitored parameters were analyzed and concluded that it is enough to monitor root mean square of the acoustic emission signal alone since all the other acoustic emission parameters are very closely related to acoustic emission root mean square. Monitoring the drilling of carbon fiber reinforced plastic nanocomposite laminates using acoustic emission is presented in this article which has not been reported so far.