thank you for your quick answer. I am trying to use multilinear isotropic hardening to model plastic behavior of a ductile material. I saw the video posted by ansys on YouTube, as below.
To use multilinear hardening, I need to input elastic strain against true stress table (beginning from the yield point, onwards). However, if I compare the values of the elastic strain (formula of which is given in the video I have shared) to the true strain, I see a difference between them in the elastic range. I just want to know that is elastic strain and true strain the same thing under the elastic range or not?