Question #703041 on Yade changed:
https://answers.launchpad.net/yade/+question/703041
Status: Open => Answered
Jan Stránský proposed the following answer:
Hello,
> FrictMat most likely met my request.
yes
> In [1], kn can set the stiffness, but in [2] it means that the
stiffness cannot be set in FrictMat, why?
You can "set stiffness" in both cited places.
In FrictMat, you use young parameter [3].
"Actual stiffness" is FrictPhys.kn, which belongs to specific interaction.
Value of FrictPhys.kn is determined from materials of interacting particles,
i.e. from two (possibly equal) values of FrictMat.young.
How the two values of FrictMat.young are combined into one FrictPhys.kn is
determined by Ip2_FrictMat_FrictMat_FrictPhys.kn [1].
Cheers
Jan
[3] https://yade-dem.org/doc/yade.wrapper.html#yade.wrapper.FrictMat.young
[4] https://yade-dem.org/doc/yade.wrapper.html#yade.wrapper.FrictPhys.kn
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