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Re: [Question #261082]: Save/compute average strain 0.5*(∇u+∇u^t)

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From: Bruno Chareyre <question261082@xxxxxxxxxxxxxxxxxxxxx>
Date: Fri, 23 Jan 2015 08:46:35 -0000
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Question #261082 on Yade changed:
https://answers.launchpad.net/yade/+question/261082

    Status: Open => Answered

Bruno Chareyre proposed the following answer:
You can generate a big table with all strain tensors, volume of the voronoi cells and porosity, using 
TW.getVolPoroDef()

grad_u and others are not registered variables. You can't access them,
but they are not difficult to calculate. They are weighted averages of
the local values. And you have values and weights (volumes) in this
volPoroDef table.

What kind of boundary conditions do you have? Usually the maco strain
can be directly deduced from them, that's why there is no real point
returning them.

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