Question #685862 on Yade changed:
https://answers.launchpad.net/yade/+question/685862
Jan Stránský proposed the following answer:
Hello,
> I think its not “part” of uniaxial strainer.
exactly. Because computation of it is not very straightforward. E.g. you can
average "particle transverse strain" as
newDistanceFromAxis/originalDistanceFromAxis-1. Then particles near the axis
would be problematic because their original length is low (or possibly 0) and
would corrupt the results.
Also it may happen that boundary particles "fly away", also corrupting the
result.
So you can e.g. somehow choose a "central ring" and do computation on these
particles.
Apart from computing transverse strain from uniaxial stress test, there is
another option how to compute Poisson's ratio.
Poisson's ratio can also be computed by comparing Young's modulus (uniaxial
stress modulus) to oedometric (uniaxial strain) modulus and/or bulk
("triaxial") modulus. See related discussion [1].
You can use both methods (transverse strain and another loading) and
compare the results of Poisson's ratio :-)
cheers
Jan
[1] https://answers.launchpad.net/yade/+question/670047
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