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Roll bending aluminum profile

Roll bending aluminum profile

Roll bending aluminum profile

(OP)
Hi guys, I´m trying to simulate the bending of an alumminum profile. The idea is to find out if the radius of the bend is too much for the material to handle, but I am not sure if my plasticy theory concepts are correct. I am using a bilinear isotropic hardening model, the thing is I am not sure how to check if the profile failed or not. In this case, the workpiece is not really needed for structural integrity and failure would be more for visible defects like cracking or wrinkling. Would it be correct to check the total equivalent strain against the elongation at break? Meaning for a material with a 12% elongation at break the strain would have to be less than 0.12? Or would I have to observe a plastic hinge forming along the bend? I´m sort of out of my element here so any help would be appreciated.

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