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Re: [Question #226254]: [Triaxial test] Unstable behavior when using different stress in different state

To: yade-users@xxxxxxxxxxxxxxxxxxx
From: Bruno Chareyre <question226254@xxxxxxxxxxxxxxxxxxxxx>
Date: Tue, 09 Apr 2013 10:31:05 -0000
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Question #226254 on Yade changed:
https://answers.launchpad.net/yade/+question/226254

    Status: Open => Answered

Bruno Chareyre proposed the following answer:
Hi,
1. There is no special reason to use a low value. You can use the same as for the deviatoric loading without problems.

2. You apparently skip one step in the general procedure, which should be:
a. densification
b. reaching the desired confinement level (and you want many values for the same sample) 
c. deviatoric loading

Your problem is because you skip b. You should add this step after
reloading a compacted sample. It can be done by internal compaction
(strain will still be zero at the begining of c) or moving boundaries
(then strain values are no longer zero, but you can reset them anyway).

I hope it helps.

Bruno

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