Question #689486 on Yade changed:
https://answers.launchpad.net/yade/+question/689486

Jérôme Duriez posted a new comment:
Maybe it would help the discussion and yourself if you do not think in
terms of "cohesion force". In JCFpm (usual case in YADE), there is only
one interaction force, which depends on relative displacements (you can
say "position" for the normal part) between particles. Cohesion just
corresponds to the possibility for e.g. tensile = attractive normal
forces, up to some breakable threshold.

If your question is about the exact expression for these force
thresholds (they do depend on particle size), doc [*] and links therein
should help

[*] https://yade-
dem.org/doc/yade.wrapper.html#yade.wrapper.Ip2_JCFpmMat_JCFpmMat_JCFpmPhys

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