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[Chiara Modenese <question178830@xxxxxxxxxxxxxxxxxxxxx>]

Question #178830 on Yade changed:
https://answers.launchpad.net/yade/+question/178830

    Status: Open => Answered

Chiara Modenese proposed the following answer:
On 17 November 2011 11:20, Chareyre
<question178830@xxxxxxxxxxxxxxxxxxxxx>wrote:

> Question #178830 on Yade changed:
> https://answers.launchpad.net/yade/+question/178830
>
> Chareyre posted a new comment:
> Jakob, this is an interesting and well commented script.
> However, I'm surprised that you didn't find problems with this procedure.
> Changing shape.radius as you do in this script is not supported (we should
> forbid that by design). rad1 and rad2 are copied inside the interactions
> when they are created. Here you change body's sizes but it is not reflected
> in interactions, leading to inconsistencies.
>
Bruno is right, but one possible workaround is that the interactions could
be created again (using O.interactions.clear()) after you change the
radius. I think there should be a comment about this somewhere in
documentation (to say that this sort of operations are not supported for
instance).

Chiara


> If I understand your script correctly, I'm affraid the procedure you
> developped was already present in Yade.
>
> I suggest you have a look at the script I'm mentionning above.
> Performing a steady particles growth is a simple as this:
>
> triax=ThreeDTriaxialEngine(
>       ...
>        internalCompaction=True, # If true the confining pressure is
> generated by growing particles
>       ...
> )
>
> An even simpler way to see what it does is to generate a triaxial test
> via the yade interface (and clicking the "internalCompaction" option).
>
> Could you please confirm that this feature is what you had in mind? Then
> we can remove your script, which seems redundant to me (and uses
> unsupported operations at the moment).
>
> wangxiaolang, let us know if the triaxial tutorial does not solve your
> question.
>
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