what is this exactly? related to soil modeling

[Mohammadafshar]

Hi every1
what are these exactly called that come after "MultiYieldSurfaceClay" phrase ?
nDMaterial MultiYieldSurfaceClay 1 2
??
tnx

[fmk]

This is a material developed at UCSD and is not included in their documentation. It probably should not be used. From the command.cpp file the following would be the inputs:

nDMaterial MultiYieldSurfaceClay tag? nd? rho? refShearModul? refBulkModul? cohesi? peakShearStra? <frictionAng (=0)> <refPress (=100)> <pressDependCoe (=0.0)> <numberOfYieldSurf (=20)>

I have no more info on the model, nor can I help if you have any problems using it!