Homogeneous stress and strain states during a simulation of a element test (exple :Triaxial test)

[Chris2016]

Hello everyone
I am modelling a triaxial element test to check the stress-strain relation of a material. I build a elastoplastic model based from the coulomb sliding friction with a softening damaged part . I noticed at the end of the simulation a non-homogeneous stress and strain states and hence a different results at integration point (hardening at the bottom and softening at the top). Please any comments about this issue will be a great help for me.

Thanks for your support.