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[Christian Jakob <question199585@xxxxxxxxxxxxxxxxxxxxx>]

New question #199585 on Yade:
https://answers.launchpad.net/yade/+question/199585

Hi,

I want to model a sand with Hertz-Mindlin-Contact law and rolling friction.

1. Is it possible to do so in yade and if yes, how?

I tried to combine a material with rolling stiffness and hertz model:

...
#define material:
id_SphereMat=O.materials.append(CohFrictMat(young=young_modulus,poisson=poisson_ratio,density=rho_p,frictionAngle=angle,alphaKr=roll_stiff))
...
	InteractionLoop(
		...
		[Ip2_FrictMat_FrictMat_MindlinCapillaryPhys()],
		[Law2_ScGeom_MindlinPhys_Mindlin()]
		),
...

but this seems to have no effect on behavior of the particles.

2. What would be a good value for lets say a well rounded sand? Has anyone experience with rolling stiffness?

Thanks in advance,

Christian

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