what is the different between elasto plastic analysis and elastic analysis in FEM in correspondent with fatigue??
after you get past the elastic limit of a material you are in the plastic range. My guess is that the material you are working with has some sort of transition range. I would say cold working of the material could lead to reduced life. Remeber there is high cycle fatigue you experience over the elastic limit of stress and low cycle fatigue for few cycles at higher stresses.
