Hi,

I am simulating a compression test of an RVE of a cementitious material. Mohr-Coulomb model needs the evolution of Cohesion Yield Stress with the absolute plastic strain and the Drucker Prager model needs evolution of Yield stress with absolute plastic strain. 

Since, cohesion yield stress in MC and yield stress in DP models are different parameters, resulting stress strain behaviour under uniaxial compression is different. 

Is there any relationship between the yield stress in DP model and cohesion yield stress in MC model. For example if I know the yield strength of the material is 100 MPa, is there any method to calculate the cohesion yield strength for MC model which will result in the same stress strain curve under uniaxial compression.

Thanks.​​​​​​​