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[liucheng83 <question201766@xxxxxxxxxxxxxxxxxxxxx>]

Question #201766 on Yade changed:
https://answers.launchpad.net/yade/+question/201766

    Status: Answered => Open

liucheng83 is still having a problem:
Sorry Bruno, I'm confused. I have read the documentation of
Ig2_Sphere_Sphere_ScGeom.avoidGranularRatcheting, but  I cannot get any
message about ks from it. And just as you said, ks is really ks only
when normal displacement is zero, but when  normal displacement is zero,
the Fn is zero, and Fs should be zero too, ks doesn't have any meaning.
And if ks is really ks only when normal displacement is zero, and when
normal displacement is not zero, how to calculate ks , there is not such
information except that 6.2.1 Stiffnesses (P129 in yade documentaion 7.0
or 8.0)

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