Dynamic Modeling and Cutting Stability of Rotating Tapered Composite Cutter Bar considering Material Damping

Table 2

First frequency and modal logarithmic decrement of the tapered composite cutter bar .

Ply angle (degree)	The first natural frequency (Hz)			The first mode logarithmic decrement
	N = 1	N = 3	N = 5	N = 1	N = 3	N = 5
0°	441.52	438.27	438.27	0.0095	0.0087	0.0087
30°	337.95	335.51	335.51	0.0143	0.0128	0.0128
60°	146.05	143.24	143.24	0.0585	0.0455	0.0455