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Re: [Question #271430]: Rolling, static and kinetic friction in Yade

To: yade-users@xxxxxxxxxxxxxxxxxxx
From: Bruno Chareyre <question271430@xxxxxxxxxxxxxxxxxxxxx>
Date: Wed, 16 Sep 2015 08:43:20 -0000
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Question #271430 on Yade changed:
https://answers.launchpad.net/yade/+question/271430

    Status: Open => Answered

Bruno Chareyre proposed the following answer:
Hi Alexander,
There is no kinetic friction, there is shear, rolling and twisting.

>so where is rolling friction coefficient...
https://yade-dem.org/doc/yade.wrapper.html#yade.wrapper.CohFrictMat.etaRoll

>... and how shear force depends on it?
No dependency. Rolling friction limits the bending to etaRoll*radius*normalForce.

>So how Yade chooses what this sphere should do (roll or slide)

It deends which threshold (friction vs. etaRoll) is reached first.

Bruno

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