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["M.Meidani" <question253425@xxxxxxxxxxxxxxxxxxxxx>]

New question #253425 on Yade:
https://answers.launchpad.net/yade/+question/253425

Hi,
I have a problem with stresses in YADE. 
I created a box and filled it with spheres as soil. Now I need to get a stress in Z direction (sigma Z) in  different height.
For this scope I found three ways in YADE.

1- bodyStressTensores():  Getting stress for each particle, then average particle's stresses that has almost equal height and then multiply it by (1-n). n is prosity. [1]

2- bodyStressTensores() and TesselationWrapper(): Using micro-stress method and then average particle's stress which are in almost same height. [2]

3- Force method: Export f(z) for each particle then sum forces in almost same height. Then divide it by  area of the bottom box.

I have done all of these methods but the results are not same. Which one is more realistic and reliable? Theoretical method is Gama* Z, but non of them are close to this value!

[1] https://yade-dem.org/doc/yade.utils.html?highlight=bodystresstensor#yade._utils.bodyStressTensors
[2] https://yade-dem.org/doc/user.html#micro-stress

Thanks. 

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