Since there was no reply, I did it (r2653) using the relative angular velocity. For me it was much simpler than what I found in the paper I attached but let me know had you any comment. Cheers. Chiara
On 12 January 2011 11:23, Chiara Modenese <c.moden...@gmail.com> wrote: > Hello, > > how would you compute the relative rotation between two particles only due > to rolling? I found this report where the code for the bending moment would > be describe in 3d (see attached file). Eq. 12 gives the incremental rolling, > is that what I should implement in Yade if I want the same behaviour? > > Thanks for help. > Chiara > > > > > On 17 December 2010 15:40, Chiara Modenese <c.moden...@gmail.com> wrote: > >> Ok! Thanks all for suggestions. I agree that for now it is simpler to code >> it in the Law functor. I will do and then test it with before commit. I let >> you know if issues arise. Anyway, I will probably not be able to commit it >> before Christmas -- in case someone else needed it (btw, Happy Christmas to >> everyone!). >> >> Cheers, Chiara >> >> On 17 December 2010 15:03, Bruno Chareyre <bruno.chare...@hmg.inpg.fr>wrote: >> >>> >>> > You can write the incremental rotations in the Law2 functor first >>> > (just like the current rotation of ScGeom6D algorithm used to be in >>> > CohesiveFrictionalContactLaw) and use plain ScGeom, >>> Thats right. >>> >>> > later move to ScGeom6D. If you move it it in ScGeom6D, however, it >>> > will mean dragging all the quaternions in ScGeom6D uselessly. >>> Indeed, it will make 3 useless quaternions. Mmmh.. in fact it could be >>> moved to base ScGeom. relSpin would be dragged by pure 3D interactions >>> but it's only one vector. >>> In that case CFLaw could work with two different geometries (ScGeom for >>> incremental, ScGeom6D for total). >>> Let's see it work first, then we can think about design. >>> >>> Cheers. >>> >>> Bruno >>> >>> > If you are inclined towards experimentation, you could have a look at >>> > L6Geom. >>> > >>> > HTH, v >>> > >>> > _______________________________________________ >>> > Mailing list: >>> > https://launchpad.net/~yade-dev<https://launchpad.net/%7Eyade-dev> >>> > Post to : yade-dev@lists.launchpad.net >>> > Unsubscribe : >>> > https://launchpad.net/~yade-dev<https://launchpad.net/%7Eyade-dev> >>> > More help : https://help.launchpad.net/ListHelp >>> > >>> >>> >>> -- >>> _______________ >>> 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 >>> ________________ >>> >>> >>> _______________________________________________ >>> Mailing list: >>> https://launchpad.net/~yade-dev<https://launchpad.net/%7Eyade-dev> >>> Post to : yade-dev@lists.launchpad.net >>> Unsubscribe : >>> https://launchpad.net/~yade-dev<https://launchpad.net/%7Eyade-dev> >>> More help : https://help.launchpad.net/ListHelp >>> >> >> >
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