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[Bruno Chareyre <question269063@xxxxxxxxxxxxxxxxxxxxx>]

Question #269063 on Yade changed:
https://answers.launchpad.net/yade/+question/269063

Bruno Chareyre proposed the following answer:
Last thing, as far as per-body stress is a topic of concern: getBodyStress is exact.
It should be exactly equal to applied stress as long as you account for the volume occupied each sphere consistently (in a porous medium the local solid phase stress is larger than the macroscale stress).
In your regular array, you can apply a simple conversion rule for each sphere:
macroStress = sphereStress*sphereVolume/cubeVolume
where the cube circumbscribes the sphere.
The average of the above (in a row or in the full domain) must be exactly equal to the ansys stress - which is itself exactly equal to applied stress.

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