A short-time test is to be performed on a part with σult = 90,000 psi. σe = 40,000 psi for a ground surface. Let the service reversing stress of σR1 = 42,934 be first applied for n1 = 20,000 reversals. Then let the stress be increased to σR2 = 56,000 psi. After the application of n2 = 35,628 reversals at this stress the part failed. Find the expected life N1 of the part.
We need at least 10 more requests to produce the solution.
0 / 10 have requested this problem solution
The more requests, the faster the answer.