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[Jan Stránský <question253425@xxxxxxxxxxxxxxxxxxxxx>]

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

Jan Stránský proposed the following answer:
Hi Masood,


> 3- Actually I am not sure what is f(z)!! I used "O.forces(id)[2]" to
> export f(z) for each particle and the values were not 0. So it should be
> contact force. is it true?
>

did you mean O.forces.f(id)? If so, this is force applied to the body, i.e.
NOT contact force. Such force is 0 at static equilibrium. If in your case
it is not 0, it means that your sample is not in static equilibrium and
therefore the formula for vertical stress (gamma*z) is not valid..

cheers
Jan

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