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[Jérôme Duriez <question263739@xxxxxxxxxxxxxxxxxxxxx>]

Question #263739 on Yade changed:
https://answers.launchpad.net/yade/+question/263739

    Status: Open => Answered

Jérôme Duriez proposed the following answer:
Performing isotropic compression moving the walls at a constant rate is
still possible: you just have to switch internalCompaction to false (*)
(it is true by default)


As for the rate part, using stressMask = 7, the appropriate attribute to set is max_vel (**).

Basically, for stress controlled behavior of TriaxialStressController,
this engine tries, moving the walls with internalCompaction=0, to reach
the desired stress value in one iteration. But, without exceeding a wall
velocity of max_vel...

Then, if you want to iso-compress your sample to some pressure
significantly different from the initial one, just use stressMask=7,
internalCompaction=0, and max_vel=someValue, and you will perform an
isotropic compression at a constant strain rate corresponding to
someValue

>From my point of view, there is no reason to consider all these
attributes related to final results rather than intermediate steps.


(*) https://yade-dem.org/doc/yade.wrapper.html?highlight=triaxialstress#yade.wrapper.TriaxialStressController.internalCompaction
(**) https://yade-dem.org/doc/yade.wrapper.html?highlight=triaxialstress#yade.wrapper.TriaxialStressController.max_vel

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