I have a request from a customer that I don't think is possible & having a hard time understanding

Can anyone help me with this

They want to know the difference between (2) designs, A - Steel Frame & B - Aluminum Frame

A Design calculated accuracy is: 1.8/1.5 Cp/Cpk; and after 200K cycles the estimated Cp/Cpk is 1.3/1.1…

B Design calculated accuracy is: 1.4/1.2 Cp/Cpk; and after 200K cycles the estimated Cp/Cpk is 1.0/0.9…

And so on…

Please help

here's how i look at it. you have a part that is constructed. you test say 10 of them, they should fall in that statistical configuration.

then you cycle them 200k and test 10 of them, they should fall in that statistical configuration.

in simulation, if you test a part 10 times, the result will be the same because the construction of each part and the materials of each part are perfect. so statistics doesn't come into play.

also with fatigue, it is not possible to create a "fatigued" component with a fatigue test. you'd need to use nonlinear. but even then, you're performing a perfect test. so statistically, the component is perfect.

not sure if that makes sense. the short answer is no. but wnated to make sure you understand why.

when it comes down to it

static analysis tells you the displacements, stresses and strains

fatigue tells you the damage and number of cycles based on the max stress compared to the part's SN curve

nonlinear could tell you about how a "fatigued" component behaves but 200k cycles would result in a long analysis.