yade-users team mailing list archive

[Jerome Duriez <jerome.duriez@xxxxxxxxxxxxxxx>]

I would say that the simplest is to control in strain only (set 
stressControl_1=stressControl_2=stressControl_3=False), and to set 
directly values of strain_rate1, strain_rate2, strain_rate3 such that
strain_rate1+strain_rate2+strain_rate3=0

What do you think about this ?

Jerome


nejib hadda a écrit :
> Hi Jerome,
>
>   I'm using the ThreeDtriaxialengine, and it gives the possibility to
> control in stress and strain at the same time. And using your notation
> downhere, I would like to make E22 and E33 follow E11 in such a way that
> Ev=0.
>
>
> Le jeudi 15 avril 2010 à 16:04 +0200, Jerome Duriez a écrit :
>   
> > Hello Nejib,
> >  From a general point of view if we note 1(=axial for ex), 2,3 
> > (=laterals) the directions of the space, L1, L2, L3 the size of your 
> > specimen in these three directions, and v1, v2 and v3 the speeds at 
> > which you displace your walls in these three directions I would say that 
> > you will be at a constant volume if you keep v1/L1 + v2/L2 + v3/L3 =0
> > (No more stress control by this way, your test will be fully strain 
> > controlled)
> >
> > Jerome
> >
> > nejib hadda a écrit :
> >     
> > > Hi,
> > >
> > > I like to make the sum of the lateral strains equal to the opposite of
> > > the axial strain so that the volumetric strain is null (Undrained
> > > triaial test).
> > > stains' computing depend on the 3 axes, is it possible to compute the
> > > lateral strains function of the axial one (stress controlled) or it
> > > would have an impact on the results?
> > >
> > > if not, I'll appreciate any other alternative to perform an undrained
> > > triaxial test.
> > >
> > > thanks  
> > >
> > >  
> > >
> > > _______________________________________________
> > > Mailing list: https://launchpad.net/~yade-users
> > > Post to     : yade-users@xxxxxxxxxxxxxxxxxxx
> > > Unsubscribe : https://launchpad.net/~yade-users
> > > More help   : https://help.launchpad.net/ListHelp
> > >
> > >   
> > >       
>
>   

--
Jérôme Duriez
ATER Iut 1 Grenoble, département GMP - Laboratoire 3S-R
04.56.52.86.49 (ne pas laisser de messages sur le répondeur)