yade-users team mailing list archive

[Luc Sibille <luc.sibille@xxxxxxxxxxxxxx>]

> Ah... Thanks Luc, I only repeated the same thing (put aside the 
> suggestion to implement this in trunk ;)).

Well, actually I made 2 or 3 simulations with a such control, but as it 
was just for a few number of simulations I did that by modifying very 
quickly with hands the necessary parameters (mass, isdynamic and so 
on...). In addition I did that with an old Yade version, where I had 
samples ready for that (compacted at different densities, under 
different stress states etc...). All that to explain why I didn't submit 
anything in the trunk, sorry.

Luc




> Bruno
>
> Luc Sibille a écrit :
> > Hi Nejib,
> >
> > When I saw Franck in Djerba, I gave him the modification I have done 
> > on an quite old version of Yade to do what you want. Have you got 
> > these modify files? If yes, they should contain the answer to your 
> > questions.
> >
> > Actually, I don't really understand your question, the idea here is 
> > that there is nothing to do. Just put the walls as dynamic objects, 
> > give them a mass and lock their rotation degree of freedom and the 
> > stress control will be naturally made through the engine NewtonDampedLaw.
> >
> > Best,
> >
> > Luc
> >
> > nejib hadda a écrit :
> > > Hi Bruno,
> > >
> > > Actually, I switched to forces applied on walls instead of walls
> > > translation because I want that my wall  moves under a stress load equal
> > > to some d_Sig= X - f(Sig1,Sig2,Sig3) where X contstant stress that do
> > > not changes while iterating.
> > > I don't see how to make this work using wall translation ('max_vel' for
> > > stress control).
> > >
> > > Any suggestion ?
> > >
> > >
> > > Le jeudi 17 juin 2010 à 15:48 +0200, Bruno Chareyre a écrit :
> > > > Walls have mass, like other bodies.
> > > > It is not very clear for me what you want to do Nejib. What is the 
> > > > difference with the stressController engine?
> > > > "Applying a force" means adding a vector to the current body force 
> > > > vector, it doesn't need or imply anything in terms of dynamic or mass.
> > > >
> > > > Bruno
> > > >
> > > >
> > > > Anton Gladky a écrit :
> > > > > 2010/6/17 nejib hadda <nejib.hadda@xxxxxxxxxxx 
> > > > > <mailto:nejib.hadda@xxxxxxxxxxx>>
> > > > >
> > > > >     .....I want to know  if the walls need to be dynamic when applying
> > > > >     forces on them?
> > > > >
> > > > >
> > > > > Walls are NOT dynamic in any case. They do not have a mass. You can 
> > > > > only move them, they cant move by themselves because of interaction.
> > > > >
> > > > > ------------------------------------------------------------------------ 
> > > > >
> > > > >
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--
Luc Sibille

Université de Nantes - Laboratoire GeM UMR CNRS

IUT de Saint Nazaire
58, rue Michel-Ange - BP 420
44606 Saint-Nazaire Cedex, France

Tel: +33 (0)2 40 17 81 78