yade-users team mailing list archive

[nejib hadda <nejib.hadda@xxxxxxxxxxx>]

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  
> >
> >  
> >
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>