yade-dev team mailing list archive

[Bruno Chareyre <bruno.chareyre@xxxxxxxxxxx>]

Hi Chiara,

Currently, the Ig2 functor will define total rotations only if
updateRotations=true.
You could add the updateRotationIncrements flag for defining the
rotation increments that will be used in laws.
For orientation update, yes, it will be very similar to shear force. You
can use the existing rotate() function on rolling moment if I don't miss
anything.
You could write the incremental law in a separate function (like
CFLaw::goIncremental()) to make things clear at the beginning. It would
be called by regular go() if incremental is activated. Both can be
merged in a second step to avoid duplicated code, when everything is
validated.

Cheers.

Bruno

On 16/12/10 00:59, Chiara Modenese wrote:
> Hi Bruno,
>
> sorry to bother you but I need a bit of directions. As for the correct
> implementation of the plasticity in the rolling behavior, I would
> choose to add to ScGeom the incremental formulation as we do for the
> shear part. Hope you agree since for me it would much simpler and more
> understandable than using quaternions. So, should I use the same
> algorithm we have now for the shear part? I mean: update the value
> according to the rotation of the contact plane and so on?
>
> Thanks for your help!
> Chiara
>
>
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Bruno Chareyre
Associate Professor
ENSE³ - Grenoble INP
Lab. 3SR
BP 53 - 38041, Grenoble cedex 9 - France
Tél : +33 4 56 52 86 21
Fax : +33 4 76 82 70 43
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