Question #706485 on Yade changed:
https://answers.launchpad.net/yade/+question/706485
Status: Expired => Open
Ezzable Macclen Anak John Maclay is still having a problem:
Hello!
I am currently doing a research on the consolidation of peat soil by
using DEM. However i am still
New question #706485 on Yade:
https://answers.launchpad.net/yade/+question/706485
Dear all,
I am currently doing a research on the consolidation of peat soil by using
discrete element method. However i am still new to this software and I would
love to learn more about this software.
Below
Question #706306 on Yade changed:
https://answers.launchpad.net/yade/+question/706306
john Marshal posted a new comment:
When using MPI (Message Passing Interface) to simulate a system with
spheres and a moving facet, you can use various approaches to make the
spheres interact with the facet
Question #701341 on Yade changed:
https://answers.launchpad.net/yade/+question/701341
John Harry posted a new comment:
Based on your description, it seems like you have encountered an error
when running your script with a confining pressure of 80MPa and an
osmotic pressure of 30 and 40MPa
, but
it is not. I have a similar problem with clumps of pfacet [1]. It was
reported in a bug report related to pfacet [2]. I am posting again
because this appears to be an error related to clumps in general. I have
put the code below.
I am using Yadedaily.
Kind regards,
Rohit K. John
[1] https
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
problem with clumps of pfacet [1]. It was reported in a
bug report related to pfacet [2]. I am posting again because this appears to
be an error related to clumps in general. I have put the code below.
Kind regards,
Rohit K. John
[1] https://answers.launchpad.net/yade/+question/697465
[2] https
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 #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 #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
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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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 #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 #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
Rohit John posted a new comment:
Hello all,
Please use the following code for post-processing
Kind regards,
Rohit
each
simulation running using one thread/code by default. So why are all the results
different? Please find my code below. Please note I am using the json module in
python to write and read the data. You may have to install it using pip install
json
Kind regards,
Rohit K. John
[1] https://yade
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 #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 #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
the pfacet does not fall apart.
Kind regards,
Rohit K. John
[1] https://answers.launchpad.net/yade/+question/695558
#
-
cube.gts
14 36 24 GtsSurface GtsFa
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
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
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
will not work unless the
stiffness of the penalty force is increased. But I suppose this increase would
require smaller dt to be stable. So is there any other way to constrain the
motion of a body along a circle, one which does not lower the dt?
Kind regards,
Rohit K. John
[1] https
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
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
rement already satisfied: mpmath in /usr/lib/python3/dist-packages (1.1.0)
How do I fix this? Please let me know if I have missed any information.
Kind regards,
Rohit K. John
[1] https://yade-dem.org/doc/installation.html#source-code
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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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-10) instead of 0. But is there a proper fix for this?
Kind regards,
Rohit K. John
https://answers.launchpad.net/yade/+question/695558
# GTS file
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 #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
or is that a mistake? I though the
nodes were supposed to be assigned intMaterial while the gridConnections were
supposed to have extMaterial.
Kind regards,
Rohit K. John
[1] https://gitlab.com/yade-dev/trunk/-/blob/master/py/gridpfacet.py
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). Is it possible to have a grid
connection such that the two nodes on its ends have different radii?
Kind regards,
Rohit K. John
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Question #696480 on Yade changed:
https://answers.launchpad.net/yade/+question/696480
david John posted a new comment:
Hey, are you an expert web developer? I have got a question for you.
Can i download all the novels and books from this site with a single
click or have to https
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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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
using, but I could not find
it. Kindly help me. The code is given below.
Kind regards,
Rohit K John
#
Code
from yade import geom, utils
from yade.gridpfacet import
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
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 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 #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 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 #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 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 #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
. 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
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
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
. 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:
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
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
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 #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 #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 #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: 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
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 #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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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
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
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 #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
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 #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: 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
of deformations.
Kind regards,
Rohit K. John
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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 #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 #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
Status: Expired => Open
Rohit John is still having a problem:
Hello ,
Can anyone please help me with this issue
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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
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
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
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 #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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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
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 #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
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
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
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
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
Question #685848 on Yade changed:
https://answers.launchpad.net/yade/+question/685848
Status: Answered => Solved
John Avoilao confirmed that the question is solved:
Thanks Jérôme Duriez, that solved my question.
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Question #685848 on Yade changed:
https://answers.launchpad.net/yade/+question/685848
John Avoilao posted a new comment:
In the case i create different materials and
assign them to every object, using a different label,do i have to
use type as well?
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Question #685848 on Yade changed:
https://answers.launchpad.net/yade/+question/685848
Status: Answered => Open
John Avoilao is still having a problem:
Thank you very much Jérôme Duriez (jduriez).
1,3) From what you said I understand, that you don’t have
to assign properties propert
New question #685848 on Yade:
https://answers.launchpad.net/yade/+question/685848
Hello all,
I would like to ask the following:
I have created a plate using facetbox in order to perform strength tests (ucs..)
to JCF “rock” samples.
1)What properties should I assign to the plates?
2)Can I use the
Question #685778 on Yade changed:
https://answers.launchpad.net/yade/+question/685778
Status: Answered => Solved
John Avoilao confirmed that the question is solved:
Thanks Jan Stránský, that solved my question.
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Question #685778 on Yade changed:
https://answers.launchpad.net/yade/+question/685778
John Avoilao posted a new comment:
Thanks Jan Stránský (honzik),
I get the strain concept.
2) depends on what you want to simulate :-)
in certain case you should, in other cases you should not
Well im
New question #685778 on Yade:
https://answers.launchpad.net/yade/+question/685778
Hi to all,
I am a new user. Currently trying to simulate a compression test
I cant completely understand all the components of uniaxial strainer.
1) The strain I get is in (m/m); is it percentage elongation;
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