Stability Analysis Method for Periodic Delay Differential Equations with Multiple Distributed and Time-Varying Delays

Figure 2

The stability charts for 50% radial immersion down milling with different combinations of variable helix angle. (a) ψ = (70, 110, 70, 110)° and β = (30, 30, 30, 30)°; (b) ψ = (90, 90, 90, 90)° and β = (30, 35, 30, 35)°; (c) ψ = (70, 110, 70, 110)° and β = (30, 35, 30, 35)°; (d) ψ = (70, 110, 70, 110)° and β = (35, 30, 35, 30)°.

(a)

(b)

(c)

(d)