64
Chapter 2
(-B) -t- 2 - 4AC] 1/2
2A
2(156,000)-t-[[2(156,000)] 2- 4(0.99692)[-9(4300)2+ (156,000)2]]
1/2
2[0.99692]
312,000 4- 31,039
O’~
2[0.99692]
0.1 = 172,049 psi As before this is a safety device
0.2 = 140,915 psi This is a structural member
6000
0" 2
__ 7~2
[ 6000 ]|/2=
?= In(140,915)_]
0.1164" compared to 0.116 in Example 2.14.
~r = 0.005(0.1164) = 0.0006
EXAMPLE 2.16. The card sort and partial derivative can be compared to obtain the standard deviation for loading of a cantilever beam
for and its stress in Fig. 2.10.
MC
I
(PL)h/2
bh3/12
6PL M
bh 2
Z
Figure 2.10 Tip loaded cantilever beam.