Question #275459 on Yade changed:
https://answers.launchpad.net/yade/+question/275459
Status: Open => Answered
Bruno Chareyre proposed the following answer:
Both ways are consistent. If it considered that friction coefficient gives an
upper bound of the elastic force then the fact that elastic+viscous force can
be larger is consistent (this is the current situation).
If it is decided that the upper bound is an upper bound for the total force,
then it should not exceed (not possible currently if I understand correctly).
There is no "best" assumption in my opinion, they are both constitutive
assumptions and which one is closer to reality may depend on the materials.
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