sand liquefaction modelling in Anura3D

Beginner level question for this forum – Trying to replace a Mohr-Coulomb model of sand in an Anura3D simulation with a material model which accurately describes sand liquefaction. References I’ve found suggest Ta-Ger and ‘von Wolffersdorff (1996)+Niemunis/Herle (1997) extension’ have been used for this purpose in previous academic publications. Does there exist a freely available sand liquefaction model which can be integrated with Anura3D, and/or what do soil model experts identify as the ‘simplest possible’ method for modelling sand liquefaction with Anura3D?