how can i get the cohesion yield stress in Mohr-coloumb plasticity

Hi my friends,

in Mohr-coloumb plasticity model in abaqus program, there is hardening table,this table includes both cohesion yield stress and absolute plastic strain.

the question is this cohesion yield stress is calculated from the stress -strain diagram, or this cohesion is estimated from the shear test, you know when you draw a relationship between shear stress and normal stress you can get both cohesion and friction angle.

the second question is :- how can i see the model while it is running, i am using abaqus 6.6.

thanks alot.

Gamal