x
List of Symbols
kd
MTTF - -
N
N - A/B
Nf(t)
Ns(t)
t’(A_)
P(A)
P(A + B)
P(AB)
P(A/B)-"B"
P(B/A)-"A"
p~
Q(t) - Nf(t)/N
q
O’mi n
O’ma x
(~)
N~(~)
R(t)
t
I~ A - #~
t[(5~)~ + (L)~]
(w) - ~/K
X~
Y
Temperature
Stress concentration
Residual stress
Internal structure
Environment
Surface treatment and hardening
Fretting
Shock or vibration loading
Radiation
Corrections above 10 7 cycles
Constant failure rate e
-At
The total number of test samples
Safety factor for ar - O’m curve
Items failed in service by time t
Items in service at time t
Probability of A occurring
Probability of A not occurring
Probability A or B can happen or both
Probability A happens followed by B
Happened the probability that it was followed by
Happened, the probability it was followed by "B"
Percent failures
Probability failure items failed versus total
Notch sensitivity factor
Stress ratio Chapter 2
Range of data Sturges Rule Chapter 1
Reliability (items in service versus total)
Gaussian standard deviation calculated from test
samples
Students distribution (Appendix E)
coupling equation
Generic Life-Expectancy Distribution
Cell width Sturges Rule
Standard deviations in a card sort
A sample Gaussian mean calculated from test
samples
Cold working improvements for kf