Non linear analysis vs stress linearization
Non linear analysis vs stress linearization
(OP)
Got a question on the way to go to perform fatigue calculations. If some yielding is known to be taking place based on linear elastic analysis, do you linearize to deduce fatigue stress, or is say elastic plastic analysis a better option. What governs the choice of calculation method in these cases?





RE: Non linear analysis vs stress linearization
so what %age is your fatigue load of your static (ultimate?) load ?
RE: Non linear analysis vs stress linearization
RE: Non linear analysis vs stress linearization
RE: Non linear analysis vs stress linearization
but they are linear, 'cause thats what the L in Linear FEA stands for. so if you want the results for 20% load you can divide the results for 100% load by 5. maybe this'll get you back to the real world. if you're still above fty, then you'll need a NL FEA to get the "real" stresses near your stress concentration.
or you could use a Kt factor ...
RE: Non linear analysis vs stress linearization
Fatigue analysis is largely based upon statistics, and I guess all agree that statistics is another limited model for the reality.
Well, I guess I got into the philosophical corner.