How MOOSE implement the 'SolidMechanicsPlasticMohrCoulomb' for Mohr-Coulomb non-association flow, any documents or equations?

[Yulongggggg]

Hi Guid, long time no see. Can you give me some documents or files about how MOOSE implements the Mohr-Coulomb non-association flow? I am wondering how it's implemented

[GiudGiud]

I'm afraid we dont have much documentation on this.
Maybe look for journal articles published around the time that code was added? They might explain the model and implementation

so around 2017 by Andrew Wilkins

[Kavan-Khaledi]

check this, maybe it helps:
modules/solid_mechanics/test/tests/capped_mohr_coulomb/capped_mohr_coulomb.pdf