Characterization and optimization of vibration-assisted drilling of fibre reinforced epoxy laminates

High performance cutting of advanced aerospace alloys and composite materials

“…23 shows an example for the entry delamination and hole surface roughness maps when drilling holes in woven CFRP using 6 mm carbide twist drill [184]. Similar approach has also been used by Sadek et al [188] to establish machinability maps in the context of low frequency-high amplitude vibration assisted drilling of woven CFRP composites.…”

“…Sadek et al [188] have investigated the effect of the low frequency vibration-assisted drilling (LFVAD) process parameters, and their interactions, on hole quality. Compared to the conventional drilling of CFRP, they observed cutting force and tool temperature reduction by up to 45% and 30%, respectively.…”

Advances in material and friction data for modelling of metal machining

“…24 shows, for a cylindrical body (d = 100 mm) rotating at n = 10,000 rpm, h is in the range of 25-40 W/m 2 K. In the case of convection heat transfer in narrow gaps of thickness g, which is encountered in vibration-assisted machining for example, Nu is also a function of the ratio G between the gap thickness and the radius of the rotating part r; Nu = f (Re,G) [190]. [190]. A similar effect of Taylor vortices is also expected in orbital drilling [191].…”

Effect of ultrasonically-assisted drilling on carbon-fibre-reinforced plastics

“…Apparently, reduction of this force can diminish the extent of drilling-induced damage. Hence, it was realised that vibration assisted drilling has potential as a viable nontraditional drilling method for damage free drilling in heterogeneous composites [4,5,6,7].…”