3.4.3 Calculation of a ring flexibility
A ring flexibility can be evaluated by the following formulae (see Fig.6):,
D1, D2 - ring inner and outer diameters;
b - ring width;
s - ring thickness.
d - maximal displacement (equal to a center pedestal height);
A - Young module;
n - number of center pedestals ;
d - milling cutter diameter;
b1 - center pedestal width.
Stress in the ring is calculated by the formulae
The fatigue safety factor is calculated by a formulae similar to a flexible element one