New question #199585 on Yade:
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Hi,
I want to model a sand with Hertz-Mindlin-Contact law and rolling friction.
1. Is it possible to do so in yade and if yes, how?
I tried to combine a material with rolling stiffness and hertz model:
...
#defin
Question #199585 on Yade changed:
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Status: Open => Answered
jduriez proposed the following answer:
Hello,
Once you have identified the contact law you need (assuming it is indeed
Law2_ScGeom_MindlinPhys_Mindlin() ), you have first to use the
Question #199585 on Yade changed:
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Luc Scholtès posted a new comment:
Hi Jacob,
For the 2nd point, you may want to have a look at the paper from
Plassiard: http://www.springerlink.com/content/16688jw766197204/ (I can
send it to you if you cannot
Question #199585 on Yade changed:
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Christian Jakob posted a new comment:
Thanks for the fast answers.
@Luc: download successful ...
@jduriez:
>Here, Ip2_FrictMat_FrictMat_MindlinCapillaryPhys() has two major drawbacks :
>- it uses material data
Question #199585 on Yade changed:
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Chiara Modenese proposed the following answer:
Hi Jacob,
As for point 1:
I introduced the rolling friction in HM Law some time ago. Please have a look
at the documentation, in particular at:
https://yade-dem.or
Question #199585 on Yade changed:
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Chareyre proposed the following answer:
1) Yes it should be possible Everything looks correct.
The fact that it has no effect is probably only due to your constitutive
parameters.
If you really type [Ip2_FrictM
Question #199585 on Yade changed:
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Christian Jakob posted a new comment:
@chiara:
Thanks, will
...
#define material:
id_SphereMat=O.materials.append(FrictMat(young=young_modulus,poisson=poisson_ratio,density=rho_p,frictionAngle=angle))
...
Inte
Question #199585 on Yade changed:
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Chiara Modenese proposed the following answer:
On 6 Jun 2012, at 15:10, Christian Jakob wrote:
> Question #199585 on Yade changed:
> https://answers.launchpad.net/yade/+question/199585
>
> Christian Jakob post
Question #199585 on Yade changed:
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jduriez posted a new comment:
>>However, linking these values with the rounded feature of the grains
is a task too difficult for me...
>What do you mean with that?
I meant that I can not point a "good" value of
Question #199585 on Yade changed:
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Status: Answered => Solved
Christian Jakob confirmed that the question is solved:
ok, thanks everybody!
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Question #199585 on Yade changed:
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Christian Jakob confirmed that the question is solved:
Thanks Chiara Modenese, that solved my question.
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Question #199585 on Yade changed:
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wangxiaoliang posted a new comment:
I am trying to add a rolling physics using
Ip2_MomentMat_MomentMat_MomentPhys
Law2_SCG_MomentPhys_CohesionlessMomentRotation
However, rolling parameters have no effect to the
Question #199585 on Yade changed:
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Christian Jakob posted a new comment:
- either you did not set parameters in right syntax (like i did)
-> send the part(s) of your code to see if it is correct
- or parameters are set to a value, where you do no
Question #199585 on Yade changed:
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wangxiaoliang posted a new comment:
Hi Jakob, as you would like to use rolling resistance, u have at least 4
DOFs ( 1 normal, 2 shear and 1 roll),
so which Ig (Interaction Geometry) do u use, ScGeom or ScGeom6D
Question #199585 on Yade changed:
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Christian Jakob posted a new comment:
ScGeom is enough in that case. ScGeom6D is needed for bending and
twisting at the contact point, not for rolling resistance.
Someone should explain the the difference in doc
Question #199585 on Yade changed:
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Chareyre posted a new comment:
The answer to "which Ig" to use is: "the one imposed by the contact law".
Different laws have rolling friction, some will use 3Dof, others will
use 6Dof.
Allthough I admit one easil
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