Question #403469 on Yade changed:
https://answers.launchpad.net/yade/+question/403469
Status: Answered => Open
Yufan Zhao is still having a problem:
Bruno, thank you very much.
But I don't know your meaning that there is no physical damping clearly.
"kinetic energy of particles needs to be
Question #403470 on Yade changed:
https://answers.launchpad.net/yade/+question/403470
Status: Answered => Solved
Weimin Song confirmed that the question is solved:
Thanks Jan Stránský, that solved my question.
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Question #403470 on Yade changed:
https://answers.launchpad.net/yade/+question/403470
Jan Stránský proposed the following answer:
In this case, just try some "normal" simulation, get the length of time
step, how much real time does it take to compute it and extrapolate how
much would 1 cycles
Question #403470 on Yade changed:
https://answers.launchpad.net/yade/+question/403470
Weimin Song posted a new comment:
Thank you, Jan.
The cycles may be above 1 times.
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Question #403339 on Yade changed:
https://answers.launchpad.net/yade/+question/403339
Status: Open => Answered
Jérôme Duriez proposed the following answer:
In my opinion it makes little sense (no offense ;-) ) to speak of forces
outside of interactions in DEM in general / Yade in
Question #403470 on Yade changed:
https://answers.launchpad.net/yade/+question/403470
Status: Open => Answered
Jan Stránský proposed the following answer:
Hello,
I have no experience with this kind of simulations and **in my opinion**
DEM is not the best approach..
What number of cycles
Question #403385 on Yade changed:
https://answers.launchpad.net/yade/+question/403385
Jan Stránský proposed the following answer:
Hi Mohsen,
please really provide a MWE :-) it would be much easier to determine the
source of problem..
First some explanation why the equivalence of micro and macro
Question #403339 on Yade changed:
https://answers.launchpad.net/yade/+question/403339
Status: Answered => Open
bruna is still having a problem:
Jerome, thank you for the clarifications.
I still have a question in this subject. Does the same that happens with
the interactions happen with
Question #403385 on Yade changed:
https://answers.launchpad.net/yade/+question/403385
Bruno Chareyre proposed the following answer:
Actually no, the micro-macro relations can always be put in a way such that
they do NOT depend on particle sizes.
In Yade, at least, it is the case (and it is
New question #403470 on Yade:
https://answers.launchpad.net/yade/+question/403470
Dear all,
Does anyone do the research of the fatigue failure of concrete using
CPM under cyclic loading, such as compression or tension load? Or is it
available using CPM or other material types in
Question #403469 on Yade changed:
https://answers.launchpad.net/yade/+question/403469
Bruno Chareyre posted a new comment:
I meant to make damping zero after the initial deposit is stable. If yo
umake it zero from the beginning the gravitational deposition will take
ages.
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Question #403469 on Yade changed:
https://answers.launchpad.net/yade/+question/403469
Status: Open => Answered
Bruno Chareyre proposed the following answer:
Hi, I would suggest to make Newton's damping 0 in such case, since it is not a
physical damping.
The question is if you need damping
New question #403469 on Yade:
https://answers.launchpad.net/yade/+question/403469
Hello everyone,
I have a problem in setting the damping coefficient of powders. Could any one
teach me how to determine this parameter.
My simulation is setting a cloud of metal powders which are settled down on
Question #403426 on Yade changed:
https://answers.launchpad.net/yade/+question/403426
Bruno Chareyre posted a new comment:
I forgot a multiplication by △t in the above equations. Let "v" be the
rotation increment equal to spin times △t and the equations are correct.
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Question #403385 on Yade changed:
https://answers.launchpad.net/yade/+question/403385
Bruno Chareyre proposed the following answer:
Hi,
Short answer:
There is indeed no simple relationship between ks/kn and the material parameter
called Poisson, but a dependency does exist (with both the solid
Question #403426 on Yade changed:
https://answers.launchpad.net/yade/+question/403426
Status: Open => Answered
Bruno Chareyre proposed the following answer:
Hi,
I understand the meaning my not be immediate but it is actually relatively
simple.
Let w be the spin vector of the grain pair.
Question #403385 on Yade changed:
https://answers.launchpad.net/yade/+question/403385
mohsen posted a new comment:
Jan
There is another point that i forgot: why in CPM material the ratio of
ks/kn is called Poisson ration? That is clear by increasing ks/kt (or
inter particle nu), macro nu
Question #403385 on Yade changed:
https://answers.launchpad.net/yade/+question/403385
mohsen posted a new comment:
Hi Jan
>could you please provide a MWE (how you evaluate "determined" and
>"computed" E and nu ).
E and nu are the parameters which CPM material needs. Hence the phrases 'inter
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