Perhaps the problem is in the extremely low selected limit stresses/pressures, but I checked the material, it is set correctly.

Perhaps the whole point is in the viscosity of the SPH, then what can be done:

1.SECTION SPH card in stock, change parameters there

2.Artificially increase viscosity

3.Play with the *CONTROL_BULK_VISCOSITY card, perhaps

4. We use KHORUGLAS for this part, the map is in stock, try to play with it, most likely it is completely unnecessary in this case for geomechanics.

No more thoughts yet. I need your advice. Thank you.