yade-dev team mailing list archive

[Bruno Chareyre <bruno.chareyre@xxxxxxxxxxx>]

> I did it a little different than I proposed lastly. The cell shrinks,
> though, when I apply pure shear, which is not right? (using
> scripts/test/periodic-triax-velgrad.py, the height decreases...)
>
> Can you check those few formulas in Cell::integrateAndUpdate? I
> commented all Hsize-related things out. _shearIncrt was renamed to
> _strainInc (since it is strain increment, no? Maybe I don't understand
> right what is what, which can also be the cause of cell shrinking?)
>
>   
I'll try to review that and make suggestions in the comming days (and 
again : no shearIncr is not strainIncr, it is really the displacement 
increment gradient for step dt, best name perhaps : "trsfIncr").
> I removed VELGRAD and unified both approaches. You can set
> strain/refSize directly,
What is strain? What is the difference between size and refSize?
What is the meaning of this? :
_shearTrsfMatrix[0][0]=_shearTrsfMatrix[1][1]=_shearTrsfMatrix[2][2]=1.;
>  and additionally you can also set velGrad.
> (Analogous to changing body position directly, or changing its
> velocity).
>
>   
Good! We are converging! :)

Cheers.

Bruno

p.s. Just to be sure I made it clear : _shearTrsfMatrix and shearIncr 
are representing arbitrary deformations in my code, and would be better 
named trsfMatrix and trsfIncrMatrix.


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