Re: [Yade-users] [Question #680898]: strain in PeriTriaxController

[zhou qian]

Question #680898 on Yade changed:
https://answers.launchpad.net/yade/+question/680898

Status: Open => Solved

zhou qian confirmed that the question is solved:
sorry  I think it's a ridiculous question. because in the 0.001 example,
the cell was stabilized 3 times while in 0.003 condition it was
stabilized only 1 time and the error accumulated.

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[Yade-users] [Question #680898]: strain in PeriTriaxController

[zhou qian]

New question #680898 on Yade:
https://answers.launchpad.net/yade/+question/680898

Hi:
I use the peritriaxcontroller. My init cell size is 1.6e-3*vector3, containing 
about1000 spheres. dt is about 2.e-6.
my goal is 
first step:
(1.e-5,1.e-5,1.e-5),mask=7, 
second step:
(1.e-5,1.e-5,currentstrain-0.003),mask=3

however, if I set the goal:
first step:
(1.e-5,1.e-5,1.e-5),mask=7, 
2th-4th step:
(1.e-5,1.e-5,currentstrain-0.001),mask=3

The final goal is the same, and I checked  PeriIsoCompressor.cpp, I think the 
strain rate is also the same (except the last step), but the stress is 
different. Changing strain 0.001, and the stress(z axis) is more stable and 
relatively smaller than 0.003.

Why the result is different?
Yours,
Joe

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