Kilowatt Isotope Power System, Phase II Plan. Volume IV. Teledyne FSCD vs GDS Page: 90 of 264
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Using (14) and (15) we have for VR
VR = 2. 02946 x 104 x 1. 128259 x 10-4 po = 124, 127 lb/in.
The maximum longitudinal stress on the cylinder is given by
1. 932 V __o a2
oL 2 + 2n (R) t
t
where
X = 1.3269 t = .170 R = 5.52 in.
then,
6L = 6467 psi
The yield point for 6061-T6 aluminum alloy at 220*F is 32.4 x 103 psi. Then the
margin of safety is
M. S. = 32400 - 1 = 4. 01
The maximum hoop stress in the cylinder is given by
2 V
6h = t R XR = 10696 psi
The margin of safety is:
S 32400 -1 = 2. 03
M.. - 10696-
For the stress on the end over we have: at r = b
(2
2 = 9. 7828 x 10-5 p0
drb
2
o- = E - hb = 9. 8 x 10 6 x 9. 7828 x 10-5 x 54. 21 x .484 =25154 psi
r = b76
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Kilowatt Isotope Power System, Phase II Plan. Volume IV. Teledyne FSCD vs GDS, report, March 15, 1978; Timonium, Maryland. (https://texashistory.unt.edu/ark:/67531/metadc1055866/m1/90/?q=%22~1%22~1&rotate=270: accessed July 16, 2024), University of North Texas Libraries, The Portal to Texas History, https://texashistory.unt.edu; crediting UNT Libraries Government Documents Department.