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[jduriez <question202803@xxxxxxxxxxxxxxxxxxxxx>]

Question #202803 on Yade changed:
https://answers.launchpad.net/yade/+question/202803

jduriez proposed the following answer:
Hello,

I would not say that rolling resistance is required to simulate
dilatancy (you will achieve this through the density of your sample).
Rolling resistance is used generally to increase the macroscopic
friction angle. It could be considered that it is a way approaching real
geomaterials, despite the spherical shape of the particles.

1. Probably https://www.yade-
dem.org/doc/yade.wrapper.html#yade.wrapper.Law2_ScGeom6D_CohFrictPhys_CohesionMoment
will do what you want.

2. About changing micromechanical parameters, the problem is that the
stiffnesses of the interactions are computed (from the material
properties) only once, when the interaction is created.

Then, if you change "during" a simulation the properties of the
materials, it will not have any consequence. Looping on all interactions
to take into account the changes is required.

This was discussed in https://answers.launchpad.net/yade/+question/197661, but it seems you still face the same problem ;-)
Answer #5 of this thread is the way to do this.

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