Question #271394 on Yade changed:
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Alexander posted a new comment:
Bruno, thank's for response
with best regards, Alexander
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Question #271394 on Yade changed:
https://answers.launchpad.net/yade/+question/271394
Bruno Chareyre posted a new comment:
1) Not sure what Euler's theorem is. What I can tell is the equations
are exact, just like having rotation matrices R1 and R2, then defining
the rotation 1->2 as inv(R1)*R2. D
Question #271394 on Yade changed:
https://answers.launchpad.net/yade/+question/271394
Status: Answered => Solved
Alexander confirmed that the question is solved:
Hi, Luc, thank's for response. I think it's something like that. The
problem that i'm not good in DEM yet and furthermore in Yade c
Question #271394 on Yade changed:
https://answers.launchpad.net/yade/+question/271394
Status: Open => Answered
Luc Sibille proposed the following answer:
Hi,
I am sorry I don't know sufficiently the code to answer you directly, I would
need to check the code. However, you can find by yoursel
Question #271394 on Yade changed:
https://answers.launchpad.net/yade/+question/271394
Alexander gave more information on the question:
Also excuse me please, if i'm a little bit annoying for you:) But i just
want to understand the theory and what i'm doing with yade:)
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Question #271394 on Yade changed:
https://answers.launchpad.net/yade/+question/271394
Status: Answered => Open
Alexander is still having a problem:
Hello Luc and Bruno thank's a lot for your response.
So about quaternions, am i right in the following:
1) Yade uses Euler's rotation theorem
Question #271394 on Yade changed:
https://answers.launchpad.net/yade/+question/271394
Luc Sibille posted a new comment:
Sorry, I read point 3 to fast, I believed your were speaking about
useIncrementalForm=False.
So forget my reply to point 3 and follow Bruno's one.
Luc
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Question #271394 on Yade changed:
https://answers.launchpad.net/yade/+question/271394
Bruno Chareyre proposed the following answer:
momentRotationLaw =False just means that there is no moment _at contact_.
The shear force is as usual it produce a moment wrt to particle centers, as
usual.
For tot
Question #271394 on Yade changed:
https://answers.launchpad.net/yade/+question/271394
Status: Open => Answered
Luc Sibille proposed the following answer:
Hi,
1/ I think you're right.
2/ It should be
M_t = k_t * O_t - twisting
M_b = k_t * O_t - bending
where O_t is the relative rotation of
Question #271394 on Yade changed:
https://answers.launchpad.net/yade/+question/271394
Status: Answered => Open
Alexander is still having a problem:
Hello, Luc. Thank you for your response.
So now i have 3 questions:
1) Do i understand correct that in the incremental form we have
following
Question #271394 on Yade changed:
https://answers.launchpad.net/yade/+question/271394
Status: Open => Answered
Luc Sibille proposed the following answer:
Hi,
Both exist in Yade: the incremental and the non incremental computation. You
can use what you want to with the attribute useIncrementa
Question #271394 on Yade changed:
https://answers.launchpad.net/yade/+question/271394
Alexander gave more information on the question:
Also screens for [Bourrier2013] where bending and twisting moment are
described:
http://i10.pixs.ru/storage/8/2/9/pic1JPG_3044845_18789829.jpg
http://i11.pixs.
New question #271394 on Yade:
https://answers.launchpad.net/yade/+question/271394
Hello everybody!
Bending and twisting moment in CohFricPhys computes via relative rotations
between particles
(https://yade-dem.org/doc/yade.wrapper.html#yade.wrapper.Law2_ScGeom6D_CohFrictPhys_CohesionMoment)
Ca
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