Question #675377 on Yade changed:
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Mehdi Pouragha posted a new comment:
I understand what you are saying , and I am not implying that there is
anything wrong with the code and functions!
All I am saying, at the risk of repeating myself, is that
Question #675377 on Yade changed:
https://answers.launchpad.net/yade/+question/675377
Bruno Chareyre posted a new comment:
> cell.getSmallStrain() will contain non-negligible errors, even for
small increments of strain
Nope, it will not, this is where you loose me. :)
When you don't reset trsf
Question #675377 on Yade changed:
https://answers.launchpad.net/yade/+question/675377
Mehdi Pouragha posted a new comment:
The objective was to 1) apply constant normal and shear strain rates,
and 2) measure the strains-- both within small strain ranges.
As you mentioned, the first one
Question #675377 on Yade changed:
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Chareyre posted a new comment:
Yes and no... the question is actually confusing me. Resetting trsf is
probably a good idea but I would suggest to step back: there is no need to
consider small strain increments
Question #675377 on Yade changed:
https://answers.launchpad.net/yade/+question/675377
Mehdi Pouragha posted a new comment:
So the right way of measuring small strains is to reset the O.cell.trsf
to identity and use O.cell.getSmallStrain() (which is the same as my
original measurement of strain),
Question #675377 on Yade changed:
https://answers.launchpad.net/yade/+question/675377
Bruno Chareyre posted a new comment:
I did not say a thing about "strain increments" and I don't dare trying because
it leads to rather complex finite strain problems, and in most cases (including
yours) it is
Question #675377 on Yade changed:
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Mehdi Pouragha posted a new comment:
As far as I understood, you are saying that the small strain increments
should be measured through the dF that you defined in #4, not from the
increment in O.cell.trsf alone,
Question #675377 on Yade changed:
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Bruno Chareyre posted a new comment:
> to include this calculation of strain somewhere in the examples
Which calculation, sorry? I did not define any strain in #4.
Bruno
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Question #675377 on Yade changed:
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Mehdi Pouragha posted a new comment:
Thanks Bruno and Robert for the clarifications. I really appreciate all
the support! I understand it much better now.
It may be a good idea to include this calculation of
Question #675377 on Yade changed:
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Status: Answered => Solved
Mehdi Pouragha confirmed that the question is solved:
Thanks Bruno Chareyre, that solved my question.
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Question #675377 on Yade changed:
https://answers.launchpad.net/yade/+question/675377
Bruno Chareyre proposed the following answer:
Hi Mehdi,
If I understand correctly the main problem is that you expect from the
transformation tensor properties which only apply in the small strain + small
Question #675377 on Yade changed:
https://answers.launchpad.net/yade/+question/675377
Robert Caulk proposed the following answer:
Hello Mehdi,
Ok, thankyou for clearly elaborating. It seems you might be confused
about the definition of the transformation matrix in this case. Here,
O.cell.trsf,
Question #675377 on Yade changed:
https://answers.launchpad.net/yade/+question/675377
Mehdi Pouragha posted a new comment:
Thanks for the explanation Robert!
>> is it that you believe the transformation matrix, O.cell.trsf[0,1], should
>> be equivalent to the strain values,
Question #675377 on Yade changed:
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Status: Open => Answered
Robert Caulk proposed the following answer:
Hello,
>> 1) why the same rates produce different strain increments?
I do not understand your question. I ran your script, which
Question #675377 on Yade changed:
https://answers.launchpad.net/yade/+question/675377
Description changed to:
Hi all,
I have a question regarding PeriTriaxController. In the following simple
simulation, when I assign the same strain rate to exx, eyy, and exy, the
increments of strain I measure
New question #675377 on Yade:
https://answers.launchpad.net/yade/+question/675377
Hi all,
I have a question regarding PeriTriaxController. In the following simple
simulation, when I assign the same strain rate to exx, eyy, and exy, the
increments of strain I measure at end () are NOT the same
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