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[Question #267175]: shear test

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From: giulia <question267175@xxxxxxxxxxxxxxxxxxxxx>
Date: Wed, 20 May 2015 15:31:28 -0000
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New question #267175 on Yade:
https://answers.launchpad.net/yade/+question/267175

Ciao!
Shear test of a cubic sample:
at first there's an isotropic compression 
and then the shear simulation, where the mean stress is manteined costant at 100kPa.

In the first part i used 'O.cell.velGrad(x,0,0, 0,x,0 0,0,x)'  and a 'limitMeanStress', in the second one i used O.cell.velGrad(0,0,x, 0,0,0, 0,0,0), so shear in xz plane and a limitation of distorsion O.cell.trsf [0,2].  

How can i impose the mean stress '(sigma1+sigma2+sigma3)/3'  costant during the second part of simulation?

thanks

giulia

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