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[Chien-Cheng Hung <question689439@xxxxxxxxxxxxxxxxxxxxx>]

Question #689439 on Yade changed:
https://answers.launchpad.net/yade/+question/689439

    Status: Answered => Open

Chien-Cheng Hung is still having a problem:
Hi Jan,

Thanks for your reply!

> please be more specific. I have tried your code, and it seemed to work
ok (the box and boundary particles behaved like rigid body)

Sorry for the vague description. What I mean is after pressing the
"play" button, isotropic compression begins and the spheres penetrate
into the box. If I use walls as top and bottom boundaries instead of the
clump, I can successfully confine the spheres within the middle space
without any penetrating issue happen. It's not the thing whether the box
and boundary particles behaved like a rigid body or not.

> if this is the problem, then it is probably due to stiffness and/or
loading conditions

I am wondering whether I can "turn off" the periodic boundary condition
in the Y direction to avoid this issue. Do you know how to do that?

Thanks again!

Chien-Cheng

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