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[Question #174878]: extension test

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From: Chiara Modenese <question174878@xxxxxxxxxxxxxxxxxxxxx>
Date: Mon, 17 Oct 2011 12:56:15 -0000
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New question #174878 on Yade:
https://answers.launchpad.net/yade/+question/174878

Hi (Bruno?), 

have you ever tried to run an extension triaxial test using the periodic boundary? I have tried but I do not know why I record instabilities while using the same type of material and sample that I test during the shear phase of a typical compression triaxial test. 

To run the extension test I just set stressMask=4 which (should) correspond to a stress control in the vertical direction while in the horizontal direction strain control is required. Of course I set the goal stress according to this assumption. Am I doing something wrong?

Thanks for suggestions, Chiara

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