yade-dev team mailing list archive

[Bruno Chareyre <bruno.chareyre@xxxxxxxxxxxxxxx>]

Hi Jérôme,
It seems the "tutorial" triax is broken after the sign changes. Can you
please have a look?
https://answers.launchpad.net/yade/+question/258550

Bruno

On 24/11/14 19:20, Jerome Duriez wrote:
> Dear Yade users,
>
> Changes were introduced recently in the code of "Triaxial" engines
> (e.g. TriaxialStressController) : see code update [1] for details.
> Stress / strain-like attributes of such engines are now to be
> considered as positiv in tension.
>
> We understand this could appear as unconvenient to the geomechanics
> guys, and it will require you update your local scripts, in case you
> update your yade version. But the aim was to have an unique framework
> throughout the whole code so that users do not have to check in the
> doc (or in the code...) each time they set or get a stress / strain
> value using Yade. We are much closer from this goal now.
> Note that post-processing operations in python example scripts still
> reflect the geomechanics point of view, with curves designed on
> purpose to show positiv values.
>
> Note also that the meaning of TriaxialStressController (and derived
> engines) stress attribute has slightly changed. There is now one
> unique convention for stress(id), whatever id value : stress(id)
> returns the sample stress, as measured along boundary 'id', with 'id'
> between 0 and 5. Hence there is no more any sign difference between
> stress(0) and stress(1) for example.
>
>
> Second, for what concerns users of CapillaryPhys or
> MindlinCapillaryPhys classes, the meaning of fCap has been inverted in
> the code update [2]. For a given interaction, fCap corresponds now to
> the force sustained by the particle corresponding to interaction.id2
> (it was the force sustained by interaction.id1 before). Here again,
> this could require some updates of local scripts on your side, but
> corresponds now to a global Yade framework.
>
>
> We hope this will finally improve your Yade experience !
>
> Jerome Duriez
>
> [1]
> https://github.com/yade/trunk/commit/19e81a785b19a8eab2718ebb5ad5eb9456355818
> [2]
> https://github.com/yade/trunk/commit/40df7e8944bfafa2d6aac19b837e4a091ea29b34
>
>
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-- 
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Bruno Chareyre
Associate Professor
ENSE³ - Grenoble INP
Lab. 3SR
BP 53
38041 Grenoble cedex 9
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Fax : +33 4 76 82 70 43
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