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Re: Sample uniformity


Hi Chiara,

What do you mean by "uniformity": by plotting the distribution of contact
orientations, you can see if your sample is more or less isotropic but you
cannot check like that if the sample is homogeneous. If it is this last
point you want to check you would need to plot for instance the contact
density, or the mean contact force value with respect to the distance from
the sample centre.

Good luck, Luc

> Hi all,
> I would have a question about the uniformity of the packing in the
> triaxial.
> There is a nice function utils.plotDirections() which returns the
> orientation of the interactions with respect to the three planes of the
> global system. I was using this function at the end of the initial phase
> of
> the triaxial, both trying the compaction and the expansion method
> alternatively. I am getting preferential directions along the vertical and
> horizontal global axes. I was expecting a better solution adopting the
> expansion method but apparently it does not help too much.
> Did/Do you have the same problem? What would you suggest to avoid it?
> Thanks.
> Chiara
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Luc Sibille
Université de Nantes - Laboratoire GeM

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

Tel: +33 2 40 17 81 78

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