Re: [Yade-users] [Question #701581]: Difference between FrictMat and cohFrictMat without cohesion and moment

2022-05-02 Thread Bruno Chareyre
Question #701581 on Yade changed:
https://answers.launchpad.net/yade/+question/701581

Status: Open => Answered

Bruno Chareyre proposed the following answer:
Hi,
Unless you found a bug, yes, the two cases should be equivalent.
It's hard to know if you made a mistake in converting materials or if there is 
really a difference due to the code.

Currently, your scripts are way too complex to dive in. If you could
elaborate a simpler example maybe someone could check in more details.

Bruno

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Re: [Yade-users] [Question #701581]: Difference between FrictMat and cohFrictMat without cohesion and moment

2022-05-02 Thread Jérôme Duriez
Question #701581 on Yade changed:
https://answers.launchpad.net/yade/+question/701581

Jérôme Duriez posted a new comment:
I think we can find logical that CohFrictMat without cohesion and moment
would indeed be equivalent to FrictMat. Whether that is the case may
indeed deserve attention, since the C++ implementations [1] look to be
completely independent (no one is calling the other one, for instance).

If you seek help in investigating this question, I would advice you
further try to propose minimal scripts, though.

[1] https://gitlab.com/yade-
dev/trunk/-/blob/master/pkg/dem/CohesiveFrictionalContactLaw.cpp#L109
and https://gitlab.com/yade-
dev/trunk/-/blob/master/pkg/dem/ElasticContactLaw.cpp#L56

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