|
P/N |
LIFE(N) |
1/(2N*50%) |
1/(2N*30%) |
1/(2N*20%) |
1/MTBF=C+D+E |
MTBF =1/(C+D+E) |
|
81531651-01 |
20000 |
0.00005 |
8.33333E-05 |
0.000125 |
0.000258333 |
3870.967742 |
|
81575857 |
50000 |
0.00002 |
3.33333E-05 |
0.00005 |
0.000103333 |
9677.419355 |
|
81571877 |
20333 |
4.91811E-05 |
8.19686E-05 |
0.000122953 |
0.000254103 |
3935.419355 |
|
81530208 |
27000 |
3.7037E-05 |
6.17284E-05 |
9.25926E-05 |
0.000191358 |
5225.806452 |
|
81535421 |
50000 |
0.00002 |
3.33333E-05 |
0.00005 |
0.000103333 |
9677.419355 |
|
81571862-01 |
30000 |
3.33333E-05 |
5.55556E-05 |
8.33333E-05 |
0.000172222 |
5806.451613 |
|
81571867-01 |
24333 |
4.10965E-05 |
6.84941E-05 |
0.000102741 |
0.000212332 |
4709.612903 |
|
81537853-01 |
28000 |
3.57143E-05 |
5.95238E-05 |
8.92857E-05 |
0.000184524 |
5419.354839 |
|
81535301-01 |
38000 |
2.63158E-05 |
4.38596E-05 |
6.57895E-05 |
0.000162281 |
6162.162162 |
|
81531506-01 |
33700 |
2.96736E-05 |
4.9456E-05 |
7.4184E-05 |
0.000153314 |
6522.580645 |
|
81571568-01 |
21842 |
4.57834E-05 |
7.63056E-05 |
0.000114458 |
0.000236547 |
4227.483871 |
|
81571303-01 |
21750 |
4.5977E-05 |
7.66284E-05 |
0.000114943 |
0.000237548 |
4209.677419 |
|
81571654-01 |
58960 |
1.69607E-05 |
2.82678E-05 |
4.24016E-05 |
8.763E-05 |
11411.6129 |
|
81571568-01 |
21842 |
4.57834E-05 |
7.63056E-05 |
0.000114458 |
0.000236547 |
4227.483871 |
|
BOLTS |
65000 |
1.53846E-05 |
2.5641E-05 |
3.84615E-05 |
7.94872E-05 |
12580.64516 |
|
LET FD=50%, AD=30%, ED=20% |
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THEN 1/MTBF= 1/(2N*50%) + 1/(2N*30%) +1/ (2N *20%), WHERE N= FATIGUE TEST LIFE. |
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