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[Jan Stránský <question320069@xxxxxxxxxxxxxxxxxxxxx>]

Question #320069 on Yade changed:
https://answers.launchpad.net/yade/+question/320069

    Status: Open => Answered

Jan Stránský proposed the following answer:
Hi Bernardo,
there might be several reasons. Please provide a MWE (see [1], section 3)
thanks
Jan

[1] https://yade-dem.org/wiki/Howtoask

Dne 3. 8. 2016 21:52 napsal uživatel "Bernardo Albuquerque" <
question320069@xxxxxxxxxxxxxxxxxxxxx>:

>

> New question #320069 on Yade:
> https://answers.launchpad.net/yade/+question/320069
<https://answers.launchpad.net/yade/+question/320069>
>
> Hello all,
>
> I am trying to make an oedometric test but for some reasons I need the
upper plane to be a body that interacts with the spheres inside the box. I
attempted to create a box object and define its density according to the
stress I want to aply in the test. For that i used the simple equation
>
>  density = GoalStress * OedometerCrossSection / (gravity * BoxVolume)
>
> However, I cant achieve the stress I am seeking. I am calculating this
stress with O.forces.f(box#)/OedometerCrossSection. The interesting fact is
that even if I change the box density the calculated stress is always the
same. I first thought that the explanation to my problem was that box
objects are not affected by gravity, but I performed a simple script and
eliminated that hypothesis. Anybody knows what it could  be?
>
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