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[Jérôme Duriez <question678136@xxxxxxxxxxxxxxxxxxxxx>]

Question #678136 on Yade changed:
https://answers.launchpad.net/yade/+question/678136

    Status: Open => Answered

Jérôme Duriez proposed the following answer:
No, JCF* model follows the same logic as Frict* : mechanical properties
are stored/defined by the user in bodies' Material (JCFpmMat, or
FrictMat, or ...), and just computed by the corresponding Ip2. (It's
true the doc could explain this better ?)

What you should do here is to define two JCFpmMat : one for rock
particles, one for cutter particles, differing in terms of friction
angles (if that's your goal).

The friction angle of an interaction between two bodies with these two
different JCFpmMat will be the minimum of the two friction angles [*],
as computed by the Ip2 [*]

I would advice to start with just two particles.

[*] https://gitlab.com/yade-
dev/trunk/blob/master/pkg/dem/JointedCohesiveFrictionalPM.cpp#L537

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