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[Jan Stránský <question187798@xxxxxxxxxxxxxxxxxxxxx>]

Question #187798 on Yade changed:
https://answers.launchpad.net/yade/+question/187798

    Status: Open => Answered

Jan Stránský proposed the following answer:
Hi Ning,

the formula used is exactly the same (actually the same function is
called). The difference could be because of different type of
stressTensorOfPeriodicCell() and Peri3dController.stress. The first one
returns a tensor stress=Matrix3(sxx,sxy,sxz, syx,syy,syz, szx,szy,szz),
while the second one is in "vectorized" (Voigt's) notation
stess=Vector6(sxx,syy,szz, syz,szx,sxy). Is this the source of the
difference?

Jan


ceguo píše v St 15. 02. 2012 v 02:50 +0000:
> New question #187798 on Yade:
> https://answers.launchpad.net/yade/+question/187798
> 
> Hi,
> 
> I am playing with Peri3dController with label e.g. 'biax', but I find the stress returned by biax.stress is different from that by calling utils.stressTensorOfPeriodicCell(). The formula used by stressTensorOfPeriodicCell is what we commonly adopt in DEM. How stress is calculated in Peri3dController?
> 
> Ning
>

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