yade-dev team mailing list archive

[Bruno Chareyre <bruno.chareyre@xxxxxxxxxxx>]

> I don't understand how to prescribe per-component transformation rate.
> For instance I want pure shear in xy plane along +x axis, i.e. constant
> rate of εyx (whatever we have as definition of εyx), without volume
> changes; just pure shear. What value of velGrad will achieve that?
>
>   
Pure shear : velGrad =

0 1 0
1 0 0
0 0 0

Simple shear :

0 2 0
0 0 0
0 0 0


> (For instance scripts/test/periodic-triax-velgrad.py, how to make pure
> shear in the xy plane, without continuously decreasing y-size of the
> cell? O.cell.trsf is Matrix3(0.944438,0.360025,0, 0,0.944438,0, 0,0,1),
> but I would like it to be Matrix3(1,...,0,0,1,0,0,0,1). )
>
>   
I'm running out. I'll try to study that in the evening.
Should not be hard.

Ciao.

Bruno


> I would like to have some straightforward way, something like
> trsfRate=Matrix3(0,1,0, 0,0,0, 0,0,0), which would progressively apply
> just that one shear.
>
> Cheers, Vaclav
>
> PS read commit message for r1926 re NewtonIntegrator & getTrsfInc.
>
>
>
>
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