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

Table 8

The effect of ply angle on critical rotating speed and instability threshold (ς = 0.01, l/d = 10, and σ = 0.75).

θ	Critical speed (rad/s)	Instability threshold (rad/s)
0°	1809	50628
30°	1382	26225
60°	587	3146
90°	364	1097