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Re: [Question #208965]: topics on rolling resistance modeling granular media

 

Question #208965 on Yade changed:
https://answers.launchpad.net/yade/+question/208965

wangxiaoliang posted a new comment:
thanks Chareyre for your comment 
I tested script u commited, luckily it works. I have printed one of the interaction results show below
here c is one of the interaction

Yade [7]: c.phys.cohesionBroken 
 ->  [7]: False
Yade [8]: c.phys.kn
 ->  [8]: 7653241.2717035133
Yade [9]: c.phys.kr
 ->  [9]: 1593844.2946957101
Yade [10]: c.phys.ks
 ->  [10]: 3061296.5086814053
Yade [11]: c.phys.ktw
 ->  [11]: 1593844.2946957101
Yade [12]: c.phys.moment_bending 
 ->  [12]: Vector3(-105.4878453405061,512.93976974058694,129.58686704922914)
Yade [13]: c.phys.maxRollPl 
 ->  [13]: 0.050906805758850759
Yade [14]: c.phys.maxTwistMoment 
 ->  [14]: Vector3(0,0,0)
Yade [15]: c.phys.moment_twist
 ->  [15]: Vector3(300.29038157157754,-753.75279141536646,3237.7950631480908)

Obviously, norm of  c.phys.moment_bending is a bit larger than
c.phys.maxRollPl ( I think this should be the plastic rolling threshold
value ), so I think etaRoll plays no roll here, Why?

Also I found this kind of phenomena in the 2nd way I mentioned in my question using 
Ip2_FrictMat_FrictMat_MindlinPhys() + Law2_ScGeom_MindlinPhys_Mindlin()

Chareyre, Jokob or others, could u explain that

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