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[xjin <question682201@xxxxxxxxxxxxxxxxxxxxx>]

New question #682201 on Yade:
https://answers.launchpad.net/yade/+question/682201

I try to use ‘UniaxialStrainer’ to complete a simulation of uniaxial compression test for a cylinder rock specimen. 

The engines is below,
-------------------------------------------------------------------
O.engines=[ 
……,
UniaxialStrainer(strainRate=strainRate,axis=axis,asymmetry=0,posIds=posIds,negIds=negIds,crossSectionArea=crossSectionArea,blockDisplacements=False,blockRotations=False,setSpeeds=setSpeeds,label='strainer'), 
#
……,
]
---------------------------------------------------------------------
1.Dose this mean 
'the particles in the posIds and negIds are only set to have one degree of freedom-normal straining in the axial direction.'? 

2. it also means ' the particles in posIds and negIds move towards the centre of the rock specimen at same velocity during the loading process.'?

3.Dose 'the particles in posIds and negIds ' means the particles to be part of the top plate and bottom plate? and should I set the blockedDOFs of the 'the particles in posIds and negIds ?

Thanks very much!



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