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[Question #692146]: About the stress tensor in facet and wall

To: yade-users@xxxxxxxxxxxxxxxxxxx
From: Xiaolong ZHAO <question692146@xxxxxxxxxxxxxxxxxxxxx>
Date: Thu, 30 Jul 2020 14:20:50 -0000
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New question #692146 on Yade:
https://answers.launchpad.net/yade/+question/692146

Hello,  dear professors,
I recently use the 'utils.bodyStressTensor()' to obtain the stress tensors on each partcile. I found in the list, there were also the stress tensors for facets and walls. The stress tensors are the sum of the contact force of one partile divided by the its volume and is negative for compression. Since actually there is no volume in facets and walls, I want to know how these stress tenors are calculated ? 
Thank you in advance!
Xiaolong

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