Question #258679 on Yade changed:
https://answers.launchpad.net/yade/+question/258679
Janek Kozicki posted a new comment:
Sorry, I forgot to check the list.
It seems to me, then, that some values are not saved and lost upon
loading a saved file. Generally we take care that this thing does not
on notification because you are a member of
> yade-users, which is an answer contact for Yade.
>
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Question #258679 on Yade changed:
https://answers.launchpad.net/yade/+question/258679
Status: Open => Answered
Janek Kozicki proposed the following answer:
1. do you check energy at the end of first iteration, or at the beginning of
first iteration?
2. do you have correct energy in
***
> The above given are excerpts from the script I am using and this
> strategy doesnt conserve the energy. It dips sharply when the
> second script starts running.
>
> I request the help of the yade ex
Question #254831 on Yade changed:
https://answers.launchpad.net/yade/+question/254831
Status: Open => Answered
Janek Kozicki proposed the following answer:
check NewtonIntegrator
Sway said: (by the date of Mon, 22 Sep 2014 05:17:48 -)
> New question #254831 on Yade:
&
Question #252675 on Yade changed:
https://answers.launchpad.net/yade/+question/252675
Janek Kozicki posted a new comment:
> @Janek: sorry to disagree. When a bond is stretched, it stores some
> potential energy. When the bond is then broken suddenly, this potential
> energy is "los
Question #252675 on Yade changed:
https://answers.launchpad.net/yade/+question/252675
Status: Open => Answered
Janek Kozicki proposed the following answer:
when bond breaks energy goes to the kinetic energy and potential
energy in other springs. Both are tracked.
Pascal Hagenmuller s
Question #247806 on Yade changed:
https://answers.launchpad.net/yade/+question/247806
Janek Kozicki proposed the following answer:
Hi Ning,
could you describe your physical situation in which you want to apply a
rigid body rotation on a periodic cell?
The idea is quite interesting, however in
Good move.
I hope this will not make additional mess in wiki and/or documentation.
best regards
Janek Kozicki
Anton Gladky said: (by the date of Mon, 12 Mar 2012 22:08:46 +0100)
> Dear yade users and developers,
>
> I'm trying to make some changes on yade repositor
Question #156330 on Yade changed:
https://answers.launchpad.net/yade/+question/156330
Janek Kozicki proposed the following answer:
look at examples/simple-scene/simple-scene-plot.py, there you have
forces being plotted.
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Now where can I see a map of
all yade users? :)
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Question #155710 on Yade changed:
https://answers.launchpad.net/yade/+question/155710
Status: Open => Answered
Janek Kozicki proposed the following answer:
Mark S. Bentley said: (by the date of Tue, 03 May 2011 14:36:44 -)
> plot.plot(subPlots=False)
>
> then everyth
ra has some script she could perhaps send you over, to have
> a look at the procesure described. If there is general interest in such
> a functionality, it can be factored out into a function in yade.pack as
> well.
Heh, now I need it, can you share? :) My target is void ratio=0.53,
Hi Bruno,
how did you make this nice picture?
https://www.yade-dem.org/wiki/Triangulation
searching sphinx for MicroMacroAnalyzer gives nothing, this link does not exist:
https://www.yade-dem.org/sphinx/yade.wrapper.html#yade.wrapper.MicroMacroAnalyser
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Question #137168 on Yade changed:
https://answers.launchpad.net/yade/+question/137168
Janek Kozicki proposed the following answer:
jduriez said: (by the date of Thu, 09 Dec 2010 13:03:01 -)
> https://www.yade-
dem.org/sphinx/yade.ymport.html?highlight=stl#yade.ymport.stl
you can a
Question #135670 on Yade changed:
https://answers.launchpad.net/yade/+question/135670
Janek Kozicki posted a new comment:
I see it in my mailbox. Where should I send reply?
yade-...@lists.launchpad.net or question135...@answers.launchpad.net
or both?
Anton Gladky said: (by the date of Sat
this code has been "verified
> with the paper of Plassiard in GM".
Who verified this with his paper? Not me :)
I wrote that formula and verified it on a beam (made of spheres formed
into a line).
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f the inside forces equal to outside forces.
This would be a nice exercise for him to commit this to BZR. But
I cannot tell you how long you would need to wait for this.
Łukasz can you just send the code that calculates the stress to Bruno?
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Bruno Chareyre said: (by the date of Tue, 21 Sep 2010 15:29:06 +0200)
> * Copyright (C) 2007 by Bruno Chareyre *
> * Copyright (C) 2008 by Janek Kozicki *
>
> Can Karma go negative? ;-)
BTW, I've seen original Plassiard's code in SDEC, and I must t
ted rotations.
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More help : ht
ticles instead of changing radius?
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at qt tree view :)
And then, if we could click on a functor, what you want to display,
it would be so many possibilities available at once, and drawing
arrows would be really simple.
OTOH if you just want to display those arrows, in a hardcoded way,
then you need to add a GL draw functor which is
h a given sieve curve.
To achieve that I am fixing the sieve cure by controlling radius, and
I am trying different xyz and different number of particles, until I
get what I wanted. Can this be done in some better way?
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_
though.
>
> So don't spend too much time on that, if it is too compliacted.
by "that" you mean getting to run my old example?
Fortunately I managed to do that in last 4 hours. Works as before.
But still lots to be done, see y
was a bit of time ago.
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Mo
But personally I have found that using fixedBoxDims='xyz' and
controlling the box size myself gives better results.
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ll use three cores.
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More help : https://
Michael Jensen said: (by the date of Thu, 8 Jul 2010 11:35:32 -0700 (PDT))
> or are there funky results that you have learned to associate
> with time steps that are too big?
Exactly this. But we call it "instability", sounds more professional ;-)
-
s to upload your videos to youtube.
It's really easy, I was surprised myself.
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done
mencoder "mf://*.png" -o video.mpg -mf fps=25 -ovc lavc -lavcopts
vcodec=msmpeg4v2
and that's it
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Pos
If you want Bruno's posts (and all posts in fact) I can send you my
whole yade-users as an mbox file, which you could import to your mail
reader.
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s=1 and with the same scene (so the
curves should be all identical). They are not.
See attached plot. And also the script (Chiara: it is without
my shearDisp modification, it is using the correct formula).
on unrelated note:
A more technical question, since I am learning to use plot module.
Can
lready said to me plasticDissipation code looks
> right as it is. I would not be able to prove on paper why the addition of
> shearDispl increment.
yes! It shouldn't be there. I feel that this error (using shearDisp)
is somehow balancing the bug somewhere else, wh
ducing it is the first step to solving it :)
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hearDisp - (1/currentContactPhysics->ks)*(trialForce-shearForce))//plastic
disp.
.dot(shearForce);//active force
And this is BUG #2
in fact I suppose that BUG#1 == BUG#2 :) But where it is?
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<>#!/home/j
in plasticDissipation, but in kinetic energy?
The contact breaks and suddenly the sphere gets big velocity, but it
shouldn't? It would be worth checking both velocity and angular velocity.
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ipation increases. But totally
ignores the case when it decreases.
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#!/home/janek/bin/yy --threads=1
# -*- coding: utf-8 -*-
# -*- encoding=utf-8 -*-
# Script to monitor the energy of a
Janek Kozicki said: (by the date of Mon, 5 Jul 2010 01:26:08 +0200)
> where U_tot is shearDisp. I may be wrong, though - just an idea.
> The graph is still wrong, but it looks a little bit better.
yes.. I know that this is wrong. But maybe we could identify what
assumption is wrong
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More hel
e call me
Janek btw, because there's another Jan around here.
In the other email I was trying to find that plastic part and compare
with that other (trapezoidal) approach, but I didn't finish that today.
Thank you for the attached .pdfs.
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Janek Kozicki said: (by the date of Sun, 4 Jul 2010 20:47:40 +0200)
> I'm not sure if I worded myself clearly I hope that you can
> understand what I mean?
to rephrase in even different words: in plastic regime the Fs remains
constant at the limiting value. While the sphe
g path sᵢ-sᵢ₋₁.
I'm not sure if I worded myself clearly I hope that you can
understand what I mean?
IIRC Vaclav was calculating somewhere the total accumulated
_geometrical_ path of one sphere on another sphere.
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it
tomorrow. I might have made some mistake above, but you should get
the general idea.
If I find a mistake I'll let you know :)
best regards
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here?) and all that stuff.
It appears that plasticDissipation() counter is almost what you need
here - the simpler (non thermodynamic) approach which I mentioned
above. I didn't know about it - when did you add this? (time to
rediscover
.
How about heat? Usually friction increases temperature of those
bodies that are in friction. But in yade we don't have heat, so this
turns into an energy loss.
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rictPhys_Basic contact law returns 0. I have already checked on
> paper and discussed with Bruno and the code which computes
> plasticDissipation in ScGeom is formally correct.
How about heat? Usually friction goes to increasing temperature of those
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Václav Šmilauer said: (by the date of Thu, 24 Jun 2010 16:35:18 +0200)
> Vaclav, PhD :-)
wow, congratulations! :-)
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.
> How can I access that function from python?
how about this one?
from yade import export
export.text("spheres.txt")
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ting to current and future yade-users and
> > contributors.
> >
> > Thank you.
Congratulations to Vaclav, the work that you have done is colossal.
Anton, there is a piece of history written on our wiki, called [Yade
history] it&#x
Bruno Chareyre said: (by the date of Wed, 26 May 2010 11:00:31 +0200)
> p.s. Damn, man! Is there a topic not covered in your documentation?
Let's see if Vaclav will answer to this question by giving a link to
his documentation ;)
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l?
> Or later?
wow, it would be great if you could explain that. Even better with a
working python script example :) I never used paraview. The new
abilities of yade are still stunning me :)
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ex.php/Publications
? :)
(but not to http://yade.wikia.com/wiki/Publications which is
outdated, even though it still contains those .pdf files that many
people have uploaded ;)
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; will image that, it has to be done on a cluster because this has to be very
> calculation intensive.
>
> Pei-Ying
The second part seems more difficult than the first one. I'm not
working on the OpenFOAM part, and I'm not working on liquids here.
Also, currently all calculat
eudoxos said: (by the date of Fri, 05 Mar 2010 09:24:56 +0100)
> Hi Jan :-)
I suppose that's not me, right? :)
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e solution with references to ori, and pos.
How about renaming Se3 to DOF ?
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boon chiaweng said: (by the date of Mon, 14 Dec 2009 06:17:08 +0800)
>
> Thanks Vaclav for the clear explanation. Not to worry, renaming on Sunday
> night is a gd idea. I believe everyone'll appreciate that u've thought about
> them.
y
ors was just artifact. I removed Olivier's code
It wasn't an artifact :) He has cut a sphere by two planes, into 4
parts. And the he was drawing 2 parts in darker color and 2 parts in
lighter color. He did this only to allow clear seeing of sphere
rotations. That was quite
Janek Kozicki said: (by the date of Sat, 21 Nov 2009 12:51:13 +0100)
> Václav Šmilauer said: (by the date of Sat, 21 Nov 2009 11:02:27 +0100)
>
> >
> > > For sphere you don't need to rotate inertia matrix. It is symmetric
> > > in all directions.
>
a).
yes... problem is bigger.
Currently the inertia matrix is a vector!
This vector is just a diagonal of that matrix. Did the time come to fix that?
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(body-local coords) is used unrotated in NewtonsDampedLaw to
> compute angularAcceleration (global coords)? Sega pointed taht out
> earlier already IIRC.
For sphere you don't need to rotate inertia matrix. It is symmetric
in a
#x27;s orientation on the user
> interface is same as the quaternion which is used in calculation?
It is the same variable. So it is equal to itself :)
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ke sure that you work with latest yade version, and that you
will commit your changes to repository, for everyone to use this :)
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is
rotated by this rotation. So in fact those radius1,2,3 will be sizes
of your ellipsoids in x,y,z directions in coordinate system local to
ellipsoid (not the global coordinate system).
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te way. I will lose local time
instead.. So let's do the opposite. I'll stay in the solar system, and
let's move Earth forth and back at near the light speed :))
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t using python in fact (except
for some very simple stuff). Vaclav is. So students at 3sr cannot
learn python from you - only C++...
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check everything with everything"?. Some SDEC user could tell
us). And so Frederic was very happy to see how much faster SAP is :)
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Janek Kozicki said: (by the date of Mon, 16 Nov 2009 09:33:55 +0100)
> Václav Šmilauer said: (by the date of Mon, 16 Nov 2009 09:07:17 +0100)
>
> >
> > > oh, the answer is easy: we were not aware that such algorithms exist.
> > > Olivier was sure that SAP
I learned since we started yade :)
>
> In another words, Olivier (and you) didn't bother to google out articles
> on that and thought he was the smartest guy.
yeah. That time there was a LOT of other stuff to bother about, than
colliders :
re that SAP is the fastest one, and I had no experience
with colliders. It's amazing how much I learned since we started yade :)
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fast :) That's why we used it. But WE don't have a comparison with
others.
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Anton Gladky said: (by the date of Tue, 10 Nov 2009 07:28:15 +0100)
> To decrease compilation time, you can add the option pretty=0
how 'pretty' can affect compilation time?
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Vincent, is there some sample python script that takes a mesh as
input (e.g. as facets) and outputs spheres?
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marks about this part :)
best regards
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2. for the contact moment M(vector), in eqn (25), what is the physical
> meaning?
it's as if the spheres were glued together. Or as if they had a rough
surface which is able to transfer moment. If you use contact moments
and have a "line" of spheres touching each other, then they
Us are used and 12 remaining are sitting
idle. This must correspond to RAM speed, or call me crazy.
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he number it asks for.
oh, ok. I thought that this is a message from sun-grid-rnginr not yade :)
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l makes no sense at all. And
they only offered AMDs with 32 GB.
If you want to take advantage of 6 MB of CPU cache, then you
shouldn't be adding another 16 GB of *slow* RAM! You should rather
buy just only 2 GB of RAM.
If you want to take advantage of lots of RAM, you want RAM to be
fast, and do
ld me that the cluster is twice faster
than his old AMD sun workstations in his room (orioles, etc..) is
that he was running a simulation on the AMD head node, instead of
submitting it to a cluster. But I never had a chance to ask him.
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oing calculations for several months,
and I had 'htop' running of every node and I was noting down whether
I am calculating alone, or if others are also using CPU. And those
above were my observations.
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to set it. Perhaps by default it uses
just 2 CPUs? And you have 16...
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you give
> any suggestion?
> If YADE has already includes this kind of boundary, can you tell me where it
> is?
it's defined in TriaxialTest
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Chen, Feng said: (by the date of Mon, 7 Sep 2009 21:12:58 -0400)
> has the format of the command line should be changed?
yes, it changed, see `yade -h`
yade -n -- -f '2mm_0.35%_medium-01.xml.bz2' -m 40 -p -b -s 400
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those "answer" this would make those videos directly connected with
each other, there would be an URL link directly from one video to
another one.
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Ctrl-A-P previous shell
Ctrl-A-0 shell no. 0
Ctrl-A-1 shell no. 1
Ctrl-A-2 shell no. 2
Ctrl-A-Ctrl-Esc allows to scroll up
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Václav Šmilauer said: (by the date of Mon, 24 Aug 2009 19:21:20 +0200)
> Could you also, please, shut down the svn repository and other related
> stuff so that we don't leave too much stuff behind at berlios? Thanks.
sure, but tomorrow :)
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http://lists.berlios.de/pipermail/yade-dev/2009/001805.html
http://lists.berlios.de/pipermail/yade-users/2009/001727.html
:)
no more [deprecated list] here :)
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best regards, and thanks for staying with us!
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l" means all those that have a proper [[Category:SOMETHING]]
written inside them.
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e the old version more than 6 months
ago... but still I can't find time for that, heh ;)
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better to
keep the discussion public.
best regards
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Jingsong Chen said: (by the date of Sat, 27 Jun 2009 14:58:45 -)
> Dear Janek Kozicki:
>
> thank you for your suggestion, and i tried your method, but it still
> crashed as before.
>
> i also tried the simple FileGenerator examples in the code in latest
> trun
Janek Kozicki said: (by the date of Sat, 27 Jun 2009 00:47:54 +0200)
> I never got around to fix this bug, beucase synchronising threads
oh, and IIRC if you check the option "sync.display" in the Display
tab of the Simulation Controller, then this problem disappears, and
calcula
en some serious calculations are
being run, the OpenGL display is always off (no point to draw
calculations that takes few days, better to look at it after it's
finished).
There are few more simple FileGenerator examples in the code in
latest trunk, you might
an take a
> while, though, because of bigger changes being done). Vaclav
I've just returned from a conference and still quite busy. Vaclav
(and Bruno), you both have access permissions to add people to the
project. You can do it faster than me. Otherwise you will have to
wait a bit..
ease delete it.
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More
only VecMap is working?
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More
; example.
Find all the files that contain "MyTetrahedron", eg. with this command:
grep MyTetrahedron -l --include="*.hpp" --include="*.cpp" ./* -R
And read the comments inside. Look at the Publi
size.
concrete is a fake rock, lattice will work for rock fracturing,
subject to collisions limitation. Adding collisions is possible by
enveloping a lattice mesh into a polyhedron and use collision
detection between polyhedrons. A bit of work, though.
Lattice can not do dynamics, though. No impac
To avoid receiving each email twice I unsubscribed two of you from
berlios mailing list: rbarnold and ken.diang.
The mirror of our mailing list, which is on berlios will be soon
terminated. I advise to subscribe to launchpad, if you haven't done
this yet.
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