Vinayak Vipradas
Ansys Employee
I assume your model is based on the data from the Stress-Strain curve image that you have provided. If not, you can google 'Stress-Strain Curve for Aluminium alloy 3003-0' and find the required data. You need to select a sufficient number of data points in the plastic region of the curve, where the intercept of the Strain axis in the Plastic region gives Plastic Strain and the intercept of the Stress axis gives Stress coordinate. You may also need to convert data in engineering Stress and Strain to True Stress and Strain.
Does that answer your question?

Thank you Vinayak.