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[Jan Stránský <question700475@xxxxxxxxxxxxxxxxxxxxx>]

Question #700475 on Yade changed:
https://answers.launchpad.net/yade/+question/700475

Jan Stránský proposed the following answer:
Hello,

The combination of material parameters into interaction parameters is usually done inside Ip2.
In your code specifically Ip2_FrictMat_FrictMat_FrictPhys, Ip2_CohFrictMat_CohFrictMat_CohFrictPhys.
The resulting interaction value is in both cases documented ([1,2]) as given MatchMaker, or minimum value by default.
You can also see source code [3,4].

In your case, minimum value is in both cases 19.5 deg.
So your results corresponds to the implementation choice.

Cheers
Jan

[1] https://yade-dem.org/doc/yade.wrapper.html#yade.wrapper.Ip2_FrictMat_FrictMat_FrictPhys.frictAngle
[2] https://yade-dem.org/doc/yade.wrapper.html#yade.wrapper.Ip2_CohFrictMat_CohFrictMat_CohFrictPhys.frictAngle
[3] https://gitlab.com/yade-dev/trunk/-/blob/master/pkg/dem/FrictPhys.cpp#L39
[4] https://gitlab.com/yade-dev/trunk/-/blob/master/pkg/dem/CohesiveFrictionalContactLaw.cpp#L289

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