Hi,
In mild steel, it have upper and lower yield points in material curve causing by its property (low carbon). It called as yield point phenomenon.

Can I model this phenomenon by using Law2 material model in Radioss? Or else what material model can I use to model this?
I tried to use Law2 model and change strain rate following this but didn't have any result.

I used a tensile test simulation to plot material curve.
Thanks.