The OP, though, didn't mean "too much" as in "out of tolerance", but rather "too much" as in "has progressed from stress to strain and therefore is decreasing the useful lifetime of the parts."
OK, great. So can you explain how the mathematical answer is a solution to your interpretation?
Spoiler alert: it didn't. Nowhere does the mathematical answer address the question of "too much".
And what do you mean by "progressed from stress to strain?" Stress doesn't turn into strain, they exist simultaneously. You're probably trying to say progressed from elastic deformation to plastic deformation.
