Question #685903 on Yade changed:
https://answers.launchpad.net/yade/+question/685903
Rohit John posted a new comment:
Thanks for the quick reply.
Are there any other ways to plot or visualise what is going on when the
simulation is running? I am testing some simulations so I need to see
what
New question #685903 on Yade:
https://answers.launchpad.net/yade/+question/685903
Hello,
I am using Yade 2018.02b on a Virtual Box machine running Ubuntu 18.04.3 LTS.
The host machine runs Windows 10.
I was trying to learn how to plot using the first tutorial given in the YADE
tutorial
New question #686382 on Yade:
https://answers.launchpad.net/yade/+question/686382
Hello,
I am studying an impact damper. It consists of a single ball in a cavity filled
with fluid. I checked the YADE openFOAM coupling and found that it uses a drag
model to calculate the drag on a particle. I
New question #690088 on Yade:
https://answers.launchpad.net/yade/+question/690088
Hello,
I would like to simulate a sphere making contact with a brush. The sphere and
the brush are not fixed space and both can move freely. The brush is made of
individual bristles whose response to a force can
Question #692613 on Yade changed:
https://answers.launchpad.net/yade/+question/692613
Status: Needs information => Open
Rohit John gave more information on the question:
Dear Robert,
Thanks for your reply.
I am using two materials: one for the internal nodes and one for the
exter
this phenomena
is plastic deformation). I would like method so that damping occurs in the
elastic regime.
Kind regards,
Rohit John
[1] https://answers.launchpad.net/yade/+question/680927
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Question #693446 on Yade changed:
https://answers.launchpad.net/yade/+question/693446
Status: Answered => Solved
Rohit John confirmed that the question is solved:
Thanks Chareyre, that solved my question.
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Question #693446 on Yade changed:
https://answers.launchpad.net/yade/+question/693446
Rohit John posted a new comment:
Dear Bruno,
I shall update you when I have made a working code.
I have a doubt. I did not find ViscoelasticPM in the documentation. Are
you talking about
New question #693479 on Yade:
https://answers.launchpad.net/yade/+question/693479
Hello,
I created a box using pFacets. Now I want to initialise its angular velocity. I
did so by assigning the same angular velocity to all bodies in the pfacet
box(nodes, cylinders and pfacet) using
Question #693446 on Yade changed:
https://answers.launchpad.net/yade/+question/693446
Rohit John posted a new comment:
Thanks for you answer Bruno.
I have read that most of the constitutive laws do no have a velocity
base damping [1]. Is there a reason why velocity base damping
New question #692613 on Yade:
https://answers.launchpad.net/yade/+question/692613
Hello all,
I am new to yade. I have tried the basic tutorial scripts and in them the
objects are defined first followed by the engines. In an advanced script
(cylinderconnection-roots.py) I saw that the objects
Question #692956 on Yade changed:
https://answers.launchpad.net/yade/+question/692956
Status: Open => Solved
Rohit John confirmed that the question is solved:
Hello,
Thank you Janek for your advice. I shall try this.
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for position. The FieldApplier looks promising,
but how do I use it?
Kind regards,
Rohit John
[1] https://en.wikipedia.org/wiki/Clohessy%E2%80%93Wiltshire_equations
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Question #692956 on Yade changed:
https://answers.launchpad.net/yade/+question/692956
Status: Needs information => Open
Rohit John gave more information on the question:
Hello,
Thanks for your answers
reply to Robert's comments.
> Even if what you say is true (which seems odd to me
Question #693479 on Yade changed:
https://answers.launchpad.net/yade/+question/693479
Rohit John posted a new comment:
Hello,
I found a work around to this problem. I used the rotationEngine to
initialise the angular velocity. It is active for the first few
iterations and then it will be turned
Question #694531 on Yade changed:
https://answers.launchpad.net/yade/+question/694531
Status: Needs information => Open
Rohit John gave more information on the question:
Hello,
> why?
> why the other "can be handled"?
Shear force uses an incremental formulation w
Question #694531 on Yade changed:
https://answers.launchpad.net/yade/+question/694531
Status: Answered => Open
Rohit John is still having a problem:
Thank you Jan and Bruno for your comments.
>From Jan's comments
Please correct me if I am wrong, does geom->rotate(espT) rotate t
New question #694531 on Yade:
https://answers.launchpad.net/yade/+question/694531
Hello all,
Reading through the manual and source code, I found that the shear force is
modelled as a linear function of shear displacement. In each iteration, the
displacement in the shear direction, dus, is
Question #693479 on Yade changed:
https://answers.launchpad.net/yade/+question/693479
Rohit John posted a new comment:
Hello,
Sorry for the late reply. I'll see what I can do
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Question #692613 on Yade changed:
https://answers.launchpad.net/yade/+question/692613
Rohit John gave more information on the question:
Dear Jérôme Duriez,
Thanks for your advice.
However, I do not understand your comment. I have included
Law2_ScGeom_FrictPhys_CundallStrack() which, as I
Question #692613 on Yade changed:
https://answers.launchpad.net/yade/+question/692613
Status: Expired => Open
Rohit John is still having a problem:
Hello ,
Can anyone please help me with this issue
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Question #694531 on Yade changed:
https://answers.launchpad.net/yade/+question/694531
Status: Answered => Solved
Rohit John confirmed that the question is solved:
Thanks Jan Stránský, that solved my question.
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Question #694531 on Yade changed:
https://answers.launchpad.net/yade/+question/694531
Status: Solved => Open
Rohit John is still having a problem:
Dear Jan,
Thanks for helping me with this problem. I went through the source code
for CPM and I found that it is storing the shear increme
Question #695226 on Yade changed:
https://answers.launchpad.net/yade/+question/695226
Status: Answered => Solved
Rohit John confirmed that the question is solved:
Thanks Janek Kozicki, that solved my question.
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Error: No
IGeomDispatcher in engines or inside InteractionLoop".
The minimum working code is given below. Please help me to fix the issue
Kind regards,
Rohit John
##
# encoding: utf-8
"An example showing bendin
nside InteractionLoop".
The minimum working code is given below. Please help me to fix the issue
Kind regards,
Rohit John
##
# encoding: utf-8
"An example showing bending beams."
from yade.gridpfacet impo
Question #695226 on Yade changed:
https://answers.launchpad.net/yade/+question/695226
Rohit John posted a new comment:
Dear Bruno,
> what happens with super-small O.dt? (defining what is "super-small" needs to
> think about mass-viscosity-stiffness parameters)
- It depend
Question #695226 on Yade changed:
https://answers.launchpad.net/yade/+question/695226
Rohit John posted a new comment:
Dear Bruno,
>Last one maybe: in a working case (small damping), did you find
consistency _at the structural scale_ in terms of damping the
oscillations? It co
Question #695226 on Yade changed:
https://answers.launchpad.net/yade/+question/695226
Rohit John posted a new comment:
Dear Bruno,
> Problem here is we can't see you changes.
- I see. I tried pushing the code into the YADE gitlab and I got this error
remote: You are not allowed to push c
New question #697465 on Yade:
https://answers.launchpad.net/yade/+question/697465
Hello,
In the following simulation, two sphere are fired in opposite direction at a
pfacet box clump. Ideally after collision, the box starts rotating and the
spheres move in the opposite direction (opposite to
Question #697465 on Yade changed:
https://answers.launchpad.net/yade/+question/697465
Summary changed to:
Angular momentum of pfacet clump not conserved after collision
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Question #697249 on Yade changed:
https://answers.launchpad.net/yade/+question/697249
Status: Answered => Open
Rohit John is still having a problem:
Hi Bruno,
I thought the intMaterial is CohFrictMat whereas the external material
would be FrictMat. In that case wouldn't we need
New question #697249 on Yade:
https://answers.launchpad.net/yade/+question/697249
Hello all,
I was going through the code in gridpfacet.py [1] and I found that in the
definition of the cylinderConnection() function, I found that the argument
extMaterial is not used. Is it by design or is that
Question #697249 on Yade changed:
https://answers.launchpad.net/yade/+question/697249
Status: Answered => Solved
Rohit John confirmed that the question is solved:
Thanks Bruno Chareyre, that solved my question.
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Question #697791 on Yade changed:
https://answers.launchpad.net/yade/+question/697791
Status: Answered => Solved
Rohit John confirmed that the question is solved:
Dear Janek Kozicki,
Thanks for your advice. The problem is solved. I did the following
- uninstalling mpmath using pip
$ p
New question #697791 on Yade:
https://answers.launchpad.net/yade/+question/697791
Hello,
I tried compiling yade in my Ubuntu 20.04 machine. I followed the instructions
in [1]. The compilation completed without any errors. However, when I try to
run yade, I get the following:
Question #697791 on Yade changed:
https://answers.launchpad.net/yade/+question/697791
Status: Answered => Open
Rohit John is still having a problem:
Dear Janek Kozicki,
I thought pip was the standard method to install python modules.
I am able to import mpmath to python, however, it s
New question #697145 on Yade:
https://answers.launchpad.net/yade/+question/697145
Hello,
I have been working with grid connections to simulate bristles of a brush. I
wanted to know if it possible to simulation a bristle whose diameter changes
linearly along its lenght (like a cone). Is it
Question #695226 on Yade changed:
https://answers.launchpad.net/yade/+question/695226
Rohit John posted a new comment:
Thanks for your advice Bruno, I shall put an update in this thread when
I find something useful.
Kind regards,
Rohit K. John
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could use polyhedron [1], but I did not find an Ig2
functor for polyhedra and gridConnection. Do you know how to model a shape that
is capable of interacting with a gridConnection?
kind regards,
Rohit John
[1]
https://yade-dem.org/doc/yade.utils.html?highlight=polyhedron#yade.utils.polyhedron
Question #695461 on Yade changed:
https://answers.launchpad.net/yade/+question/695461
Status: Answered => Open
Rohit John is still having a problem:
Dear Jan,
>> I found that this pfacet body is hollow
> is it a problem? why?
If it is possible to set an arbitrary mass t
Question #695461 on Yade changed:
https://answers.launchpad.net/yade/+question/695461
Rohit John posted a new comment:
Hello,
Is it possible to add the pFacet body to a clump and then assign the
clump mass and MMOI? I tried using
O.bodies.appendClumped(
[O.bodies[i] for i in node_id_list
Question #695461 on Yade changed:
https://answers.launchpad.net/yade/+question/695461
Status: Open => Solved
Rohit John confirmed that the question is solved:
Dear Jan,
Thanks for your answer, I tried that and it worked.
Kind regards,
Rohit K. John
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Question #695558 on Yade changed:
https://answers.launchpad.net/yade/+question/695558
Status: Expired => Open
Rohit John is still having a problem:
Dear Klaus Thoeni,
I used the fix mentioned in [1] to fix the problem I was facing. And it
does fix the dynamics my simulation (see c
Question #695558 on Yade changed:
https://answers.launchpad.net/yade/+question/695558
Rohit John posted a new comment:
Dear Bruno,
Thanks for your explanation. I will look into it. How do I open a bug
and what information should I put into it?
Kind regards,
Rohit
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Question #695558 on Yade changed:
https://answers.launchpad.net/yade/+question/695558
Rohit John gave more information on the question:
Dear Bruno,
I think I found a solution. I found that setting the mass of the
grdiConnections to 0 seemed to fix the problem of the triangular object
rotation
Question #695558 on Yade changed:
https://answers.launchpad.net/yade/+question/695558
Status: Answered => Open
Rohit John is still having a problem:
Dear Bruno,
Thanks for you swift reply.
> Best method is to download the sources with git [1], then you update with "cd
> t
New question #696376 on Yade:
https://answers.launchpad.net/yade/+question/696376
Hello,
The simulation consists of two sphere moving towards two edges of pfacet
triangle. They just pass through the edges without any interaction. I think
there could be something wrong with the engines I'm
Question #695558 on Yade changed:
https://answers.launchpad.net/yade/+question/695558
Status: Answered => Open
Rohit John is still having a problem:
Dear Bruno,
I have found one more bug. The angular momentum value of the clump
returns (0,0,0) even though inertia is not 0 and angu
Question #695558 on Yade changed:
https://answers.launchpad.net/yade/+question/695558
Rohit John gave more information on the question:
Dear Klaus Thoeni,
I was playing around with the pfacet and I found a discrepancy in mass
of the nodes in a pfacet. I calculated the mass of the nodes using
Question #695558 on Yade changed:
https://answers.launchpad.net/yade/+question/695558
Rohit John posted a new comment:
Dear Klaus,
> Apparently there seems to be a bug in the distribution of the forces onto the
> gridNodes [1].
- Thanks for this information. Please let me know if I can he
Question #695558 on Yade changed:
https://answers.launchpad.net/yade/+question/695558
Rohit John posted a new comment:
In the comment above, I have given the code which highlights the bug.
I've modified the mikado example [1]. The newton damping is set to 0,
but you can still see this bug when
Question #695558 on Yade changed:
https://answers.launchpad.net/yade/+question/695558
Rohit John gave more information on the question:
Dear Klaus,
I was testing the mikado example [1], and I found an bug. This example
has many vertical cylinders on a pfacet square. In [1], the lengths
Question #689485 on Yade changed:
https://answers.launchpad.net/yade/+question/689485
Rohit John posted a new comment:
Hello all,
I was facing a similar issue in Yade 2018.02b in Ubuntu 18.04.5 LTS. I
tried it on Yade 2020-11-05.git-7d0ae90 and I did not get an error. So
this problem is fixed
Question #695558 on Yade changed:
https://answers.launchpad.net/yade/+question/695558
Rohit John gave more information on the question:
Dear Klaus Thoeni,
Thank you for your input on my suspicions regarding the rounding error.
Is it possible for you to give a value (or a range of values
Question #696376 on Yade changed:
https://answers.launchpad.net/yade/+question/696376
Rohit John posted a new comment:
Dear Klaus,
Thanks for working on fixing this bug. Shall I post on launchpad if I
find any additional bugs?
Kind regards,
Rohit K. John
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You received this question
. I could not find the bug in my code. I suppose
there could be something in the dynamics I am missing.
Kind regards,
Rohit John
from yade import plot, utils
from yade.gridpfacet import *
# user define function
the bug in my code. I suppose there could
be something in the dynamics I am missing.
Kind regards,
Rohit John
The minimum working code
#
---
from yade import plot, utils
Question #695558 on Yade changed:
https://answers.launchpad.net/yade/+question/695558
Rohit John gave more information on the question:
I found that the order of defining the pfacet faces is affecting the rotation.
For
pfacet_nodes = [
[nodes[0], nodes[2], nodes[1]],
[nodes[0], nodes[1
. I could not find the bug in my code. I suppose
there could be something in the dynamics I am missing.
Kind regards,
Rohit John
from yade import plot, utils
from yade.gridpfacet import *
# user define function
Question #695558 on Yade changed:
https://answers.launchpad.net/yade/+question/695558
Rohit John gave more information on the question:
Hello,
I found that the engine Law2_ScGridCoGeom_FrictPhys_CundallStrack(), was
part of the problem. This got rid of the rotation that was caused at the
start
Question #695558 on Yade changed:
https://answers.launchpad.net/yade/+question/695558
Rohit John gave more information on the question:
Hello,
Please disregards, the comment I made above (#2), now I realize that I
need Law2_ScGridCoGeom_FrictPhys_CundallStrack() to handle the
interaction between
. I could not find the bug in my code. I suppose
there could be something in the dynamics I am missing.
Kind regards,
Rohit John
#
code
from yade import plot, utils
from
New question #695545 on Yade:
https://answers.launchpad.net/yade/+question/695545
Hello,
I want to fix the rotation DOF of a pfacet. But when I tried that, the face
disappeared in the GUI. I used inspect to check the state of the facet. It
said nan for some values (pos, vel). Can you help me
Question #695558 on Yade changed:
https://answers.launchpad.net/yade/+question/695558
Status: Answered => Open
Rohit John is still having a problem:
Dear Klaus Thoeni,
Thanks for your insight into the matter. I tried your solution and it
worked. However, project involves study
Question #695461 on Yade changed:
https://answers.launchpad.net/yade/+question/695461
Rohit John posted a new comment:
Dear Bruno,
I pointed out the fact that pfacet bodies are hollow because I wanted to
simulate the dynamics of a solid body as opposed to a hollow one. I
could achieve
Question #698572 on Yade changed:
https://answers.launchpad.net/yade/+question/698572
Status: Needs information => Open
Rohit John gave more information on the question:
Hello Jan,
I am trying to simulate a rigid box that is constrained to rotate about
an axis that does pass through
New question #698572 on Yade:
https://answers.launchpad.net/yade/+question/698572
Hello,
I want to constrain the motion of a body to a circle. The answer given in [1],
recommends using a penalty force to constrain the motion of the body. If large
forces act on the body, I suppose this method
Question #698572 on Yade changed:
https://answers.launchpad.net/yade/+question/698572
Status: Answered => Open
Rohit John is still having a problem:
Dear Jan,
Thanks for clearing my doubt and your idea. I figured out a method using
Lagrangian Dynamics and Lagrangian multipliers. The I
Question #698572 on Yade changed:
https://answers.launchpad.net/yade/+question/698572
Status: Needs information => Open
Rohit John gave more information on the question:
Dear Karol,
> aren't those two statements opposite:
- You are correct, I made a mistake. It is supposed to be
Question #698572 on Yade changed:
https://answers.launchpad.net/yade/+question/698572
Rohit John posted a new comment:
Dear Karol and Jan,
Thanks for taking time from your work to come up with really creative
solutions to my problem. I will test the solutions and let you know what
I find.
Kind
New question #698754 on Yade:
https://answers.launchpad.net/yade/+question/698754
Hello all,
I am trying to make a video of a rotating pfacet clump. However, when the
pfacet clump starts rotating it seems to be falling apart in the 3D view.
According to Bruno Chareyre [1] #17 :
"Note: there
Question #698572 on Yade changed:
https://answers.launchpad.net/yade/+question/698572
Rohit John posted a new comment:
Dear Jan,
I performed a simple test on your code. I tried simulating what would
happen a sphere hits the clump "pendulum". Then the angular velocity
about the origin w
Question #698572 on Yade changed:
https://answers.launchpad.net/yade/+question/698572
Status: Answered => Open
Rohit John is still having a problem:
Dear Jan,
I tried the same test, explain in the previous comment, on a clump which
is force to rotate about the origin using a penalty fo
Question #698825 on Yade changed:
https://answers.launchpad.net/yade/+question/698825
Rohit John posted a new comment:
Dear Karol,
Thanks for spending your time to find the probable cause and proposing a
viable solution. I shall look into this and get back as soon as
possible.
Kind regards
New question #698825 on Yade:
https://answers.launchpad.net/yade/+question/698825
Hello,
I am simulating the interaction between a brush (modelled using
gridConnections) and a rotating box (pfacet clump). I noticed some
inconsistencies in the batch simulations and I tried a batch simulation in
Question #698825 on Yade changed:
https://answers.launchpad.net/yade/+question/698825
Rohit John posted a new comment:
Hello all,
Please use the following code for post-processing
Kind regards,
Rohit
Question #698825 on Yade changed:
https://answers.launchpad.net/yade/+question/698825
Status: Needs information => Open
Rohit John gave more information on the question:
Dear Robert,
I tried adding the column "!OMP_NUM_THREADS" and I set all the values to
one (given below
Question #698825 on Yade changed:
https://answers.launchpad.net/yade/+question/698825
Status: Needs information => Open
Rohit John gave more information on the question:
Hello,
I have put the content of the .log file at the end of this comment. In a
previous, albeit more complicated scr
Question #698572 on Yade changed:
https://answers.launchpad.net/yade/+question/698572
Rohit John posted a new comment:
Hello all,
I managed to make the code I had posted earlier faster (#6) by getting
an analytical solution for the non linear equations. The code is given
below. It affects
Question #698825 on Yade changed:
https://answers.launchpad.net/yade/+question/698825
Summary changed to:
Yade-batch is being indeterministic (gtsPfacet)
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Question #698825 on Yade changed:
https://answers.launchpad.net/yade/+question/698825
Status: Open => Solved
Rohit John confirmed that the question is solved:
Dear Karol,
You are correct. The problem lies with the gtsPfacet() function. It is
introducing randomness somehow.
I tried writ
Question #698754 on Yade changed:
https://answers.launchpad.net/yade/+question/698754
Status: Answered => Solved
Rohit John confirmed that the question is solved:
Dear Bruno,
Thanks for your help. I really like your creative solution. It solved my
problem
Kind regards,
Rohit K. J
Question #698754 on Yade changed:
https://answers.launchpad.net/yade/+question/698754
Rohit John confirmed that the question is solved:
Thanks Bruno Chareyre, that solved my question.
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New question #699273 on Yade:
https://answers.launchpad.net/yade/+question/699273
Hello all,
I have a simulation consisting of two spheres (S1, S2) and a clump made of two
spheres (C1, C2). The two spheres, S1 and S2, are given the same initial speed
but in the opposite directions along the
Question #699273 on Yade changed:
https://answers.launchpad.net/yade/+question/699273
Rohit John gave more information on the question:
Hello all,
I derived the equations for getting the state after the collision using
the following code
Kind regards,
Rohit K. John
Question #699273 on Yade changed:
https://answers.launchpad.net/yade/+question/699273
Status: Answered => Open
Rohit John is still having a problem:
Hello,
I apologise for not mentioning the version of Yade I use. I am using
Yadedaily. I will amend the initial description.
Kind rega
Question #699273 on Yade changed:
https://answers.launchpad.net/yade/+question/699273
Description changed to:
Hello all,
I have a simulation consisting of two spheres (S1, S2) and a clump made
of two spheres (C1, C2). The two spheres, S1 and S2, are given the same
initial speed but in the
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