Design and Stress Analysis of Extraterrestrial ... - The Black Vault

Rupture sets in only when plastic flow is propagated in the entire
diametric cross section of the disk. This is also the basis for
analyzing disks based on breaking revolutions.
Thus, the safety factor of the disk can be evaluated not
according to the stress-rupture strength at
the yield point CT:
B ,T
but according to
0 39N max 16pa nmax
where wT is the velocity of disk rotation at which stresses
9orresponding to yield point occur in all sections.
Analysis is
formed on the assumption that with the breaking
number of revolutions (or the corresponding anoular velocity w T)
centrifugal force of half the disk PC and the loop load P(ar)
are equalized by internal forces P(a T) acting in
the diametric
cross section (Fig. 3.61). This condition can be written in the
form of a sum of the projections of all
axis:
forces onto the vertical
P O r ) (, T + P e w T= -P O O, . ( 3 . 1o 1)
The subscript w T indicates that the condition is
angular velocity wT when the disk breaks.
written for
Let us find the values of components in equality (3.101) (see
Fig. 3.61):
where
P (Or .)
2 f Rad?hI.•r (Or) cos ? = •:,j (w.)R 3 Ii.
0
f Cos ?(I?-=.
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