I encounter a big challenge now.

I wanna use mohr-coulomb criterion to simulate the indentation of BMGs in ABAQUS.However, there are many parameters confusing me.

We know the  mohr-coulomb can be written as:

                            τc=k0-ασn

where τc is the shear stress on the slip plane at yielding, k0 and α are constans and σn is the stress component in the direciton normal to the slip plane.

 However, when I set the parameters in ABAQAUS, I am confused. In the following pictures, I don't know wha's the real meaning of dialation angle, so I can't fill the table. I don't know what's the real meaning of cohesion yield stress, neither. Does that have the special relation with k0 or yielding stress?

Who can tell me?

I need your help, please!

Thanks!