Comment Re:Closer to a biological system, but not quite (Score 4, Informative) 202
that's because if you design steel so it never reaches stresses of about one half of it's yield strength it will not fatigue (endurance limit)
most Al alloys have no endurance limit and thus will always eventually (maybe in 1 min or 10000 years) fail by fatigue if they do not fail some other way first
