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[zhou qian <question680898@xxxxxxxxxxxxxxxxxxxxx>]

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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