Stability Analysis of Cutting Process with Internally Damped Rotating Tapered Composite Cutter Bar

Table 10

The effect of taper ratio on critical rotating speed and instability threshold (ς = 0.01, l/d = 10, and θ = 90°).

σ	Critical speed (rad/s)	Instability threshold (rad/s)
0.25	926	2773
0.50	628	1882
0.75	475	1436
1.00	387	1169