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[Ziyu Wang <question702097@xxxxxxxxxxxxxxxxxxxxx>]

Question #702097 on Yade changed:
https://answers.launchpad.net/yade/+question/702097

    Status: Answered => Open

Ziyu Wang is still having a problem:
Hi,Jan,thanks for help!

>you can apply transverse stress, let the sample "relax", set refPos of
all bodies to current pos and continue with axial loading.

I don't particularly understand this method.In the script,the transverse stress is applied periodically by PyRunner:addForces(),then is it necessary to set refPos periodically when calculating the transverse strain?What's more,is it through the modifications as follows?
-------------------------------
   xnew=b.state.pos[0]
   ynew=b.state.pos[1]
  (Change to?)
   xnew=b.state.refPos[0]
   ynew=b.state.refPos[1]
-------------------------------

>Or you can offset it in the postprocessing phase, simply by shifting
the strain such that it has zero instead of undesired negative values.

Yes, I thought of this. However, when the transverse stress is
large(150MPa), I find that the resulting negative transverse strain is
very large (-0.0015). Can this be offset by simple movement?

Thanks!

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