Help Modelling Material in Abaqus

Hello All




I need to model a material in Abaqus that when I load the piece, the
material behaves with an Elastic modulus and when I unload the piece the
material behaves with a different Elastic modulus but don't recover all
the strain when the stress is released.




Enclosed you can find the behavior that I want to model.




Any ideas??




Thanks in advance.


David