probability of multi failures

huangyhg

probability of multi failures
for the fatigue assessment of a welded component, an sn curve is given that is generally a line of best fit through data of stress (s) against the number of cycles to failure (n).
what is the probability of 2 or more welded components, subject to the same stress, failing at the same time or failing within a certain number of cycles of each other?
corus
let's call the lowest failure n1 cycles, and the second n2
we can fairly confidently say that p(n1=n2)=~0 if n1>1000
you could do a weibull analysis.