Abaqus - Concrete model

Dear all, 

I hope you are doing great.

I perform analysis on RC wall under monotonic and cyclic load, I have utilized CDM as concrete model, but unfortunately when I extract the stress-strain curve from a particular element on the wall, I don't get the same stress-strain of material model, although the stress has exceeded the input maximum stress. 

What is the reason for that?

Thanks in advance

Abaqus