yade-users team mailing list archive

[Luc Sibille <luc.sibille@xxxxxxxxxxxxxx>]

Hi,

  basically I imagine that you can play with two parameters (I speak 
for a purely frictionnal contact law): the normal contact stiffness kn, 
and/or the coordination number. If you increase the stiffness or the 
coordination number, you will reduce the axial strain corresponding to 
peak of the stress deviator.

Luc

nejib hadda a écrit :
> The blue curve is drawn after a yade simulation whereas the red one
> (which is not driven of a yade simulation) is what I am expecting to
> have.
>
> The differences are here:
>
>  - The value of Eps11 at which Eps_v change its sign is much bigger for
> yade simulation
>  - The max negative value of Eps_v for yade response is about -1.5%, it
> is much bigger compared to red curve (about 0.4)%.
>
> I want to know what parameters in yade I need to consider or change to
> avoid this large difference.
>
>
>
>
>
> mercredi 16 décembre 2009 à 16:28 +0100, Bruno Chareyre a écrit :
> > > I don't understand why it takes so long to reach the deviatoric peak
> > > (blue curve), I mean it seem that the specimen find difficulty to
> > > converge after the compaction phase. 
> > >
> > >   
> > The curves you sent are epsilon_v and they look correct for a dense 
> > material. I don't understand the problem sorry.
> >
> > Bruno
> > >   
> > >
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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