Question #698594 on Yade changed:
https://answers.launchpad.net/yade/+question/698594
Status: Needs information => Answered
Luc Sibille proposed the following answer:
Hello Leonard,
When you say "same initial void ratio", does "initial" mean just before
the triaxial compression?
Similarly did you check the coordination number just before the triaxial
compression is the same for the two cases?
Best,
Luc
Le 01/09/2021 à 18:35, Leonard a écrit :
> New question #698594 on Yade:
> https://answers.launchpad.net/yade/+question/698594
>
> Hi,
> I carried out triaxial compression tests at two boundary conditions (one case
> with rigid wall and one case with periodic boundary), the two cases use the
> same material, the same particle size distribution and paticle number, same
> contact law and the same initial void ratio, at same confining pressure, same
> strain rate (I think), and almost the same of sample size. But I got really
> different mechanical response, especially for the volumetric behaviour, the
> periodic one shows contractive behaviour, while the rigid case shows dilative
> behaviour. I thoungh I have controlled all the conditions (except boundary
> condition) the same.
> It is not surprise that there are some difference, but is it normal to have
> such a big difference? Or did I miss some factors which can also lead to the
> difference?
>
> Thanks!
> Leonard
>
--
Luc Sibille
Université Grenoble Alpes / IUT1 de Grenoble
Laboratoire 3SR: Sols, Solides, Structures, Risques
Tel lab.: +33 (0)4 76 82 63 48
Tel IUT: +33 (0)4 76 82 53 36
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