Plasticity and yield stress on Abaqus

Hello all,

I am trying to model a material on Abaqus and I have a question about plasticity. The criterium I want to implement is linear Drucker-Präger. I think I mostly understood the way this criterium is implemented, my question is about the stresses I have to implement in front of "equivalent plastic strain" for the hardening.

Abaqus calls this stress "yield stress", I do not knew what it is . Is this the equivalent Von Mises stress ?

 

Thank you for your help,

 

Regards,

 

Antoine