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[Bruno Chareyre <question290950@xxxxxxxxxxxxxxxxxxxxx>]

Question #290950 on Yade changed:
https://answers.launchpad.net/yade/+question/290950

    Status: Open => Answered

Bruno Chareyre proposed the following answer:
You found a known bug for large objects in periodic simulations.
The bug seems to show up especially when some interactions exist at iteration 0, those ones are not detected correctly (this is your case, where you have large overlaps in the initial geometry).
I find that the problem disappear in your case if line 149 is changed as follows:

top=box(
    center=(length/2.0,yExt - yLim + thickness*2,width/2.0)
   ,extents=(4*length,thickness/2.0,width)
   ,wire=False
   ,material='plate_mat'
   )

Besides, there is absolutely no need to define a thickness for your
plates. Thickness zero is ok (mind that the default will be zero
though).

Bruno

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