Question #251712 on Yade changed:
https://answers.launchpad.net/yade/+question/251712
Status: Open => Answered
Anton Gladky proposed the following answer:
Hi,
2014-07-16 5:11 GMT+02:00 Hongyang Alex Cheng
<[email protected]>:
> 1. With VTKRecorder it is possible to export normal stress and shear stress
> of a particle but what are the physical meanings of normStress and
> shearStress and how are these stresses computed? I checked the source code
> and found the following sentences might give some hints, but I failed to
> fully understand them.
>
> In VTKRecorder.cpp: Line 454 and 455
>
> const Vector3r& stress =
> bodyStates[b->getId()].normStress;
> const Vector3r& shear =
> bodyStates[b->getId()].shearStress;
Implementation is here [1]. Feel free to check it and let us know
whether it is correctly implemented. I have doubts, crossSection
is defined as Pi*R^2, should it not be the volume?
We should probably return those to values from bodyStressTensors().
[1] https://github.com/yade/trunk/blob/master/pkg/dem/Shop_02.cpp#L176
Anton
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