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Hybrid control of boundary stress

 

Hi all. In the recent release of YADE, the independent stress and strain
control has been added by introducing a new engine
ThreeDTriaxialEngine.cpp.

I am interested in a hybrid control of the boundary stress where the
vertical walls will move   using strain control method while the lateral
two walls  will move with stress controlled method such that the
increment in S22 (say 10 kPa)  in each step due  to the  movement  of
the vertical walls  will be adjusted by reducing the S11 (say -7 kPa)
and S33 (say -3 kPa).  How can I do that?

Thanks in advanced.

Regards
Mahmud
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