yade-users team mailing list archive

[Bruno Chareyre <bruno.chareyre@xxxxxxxxxxx>]

MarcoDottor a écrit :
> Hello,
>
> I made a wall using utils.box, I would like to add a constant force
> acting on that wall but if I use DeusExMachina ForceEngine on that box
> with subscribedbody boxId it does nothing.
> Box dynamic is set to True, I dont understant why.
> If I use a Displacement or TranslationEngine it works, but I need that
> wall not to move unsopped cause it will compenetrate an imported
> geometry.
>   
You need to be more precise in describing your problems.

What means "it does nothing"?
How did you check it?
Is the force on the wall equal to 0, or is it just equal to something 
independant on your applied force?
Is it not moving at all/moving slowly so you don't realise?
etc.

I did not use the force engine before but the problem should be easy to 
find, putting a few "cerr" or "LOG_DEBUG" here and there, with tests 
based on the wall's id.

Also, I have the feeling (but I'm not sure...) that what you want may be 
keeping the force constant on the wall, instead of adding a constant 
force on it. These are two different approaches.
In the first case, you need something in the line of 
TriaxialStressController, with isDynamic=false; in the later case, 
ForceEngine is ok, with isDynamic=true.


Bruno








if (id==your wall) {
output


> I would like to make a uniaxial compression test like simulation, with
> an imported geometry on the other side.
> Is that something I'm doing in wrong way?
>
> Thank you
>   


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Chareyre Bruno
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