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[Christian Jakob <question178830@xxxxxxxxxxxxxxxxxxxxx>]

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

Christian Jakob proposed the following answer:
Zitat von 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).

So after every change in radii we have set

O.interactions.clear()

in the script and everything is ok?

If yes, I will change the script and upload again...

thanks chiara.

>
> 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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>
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