Re: [Yade-dev] [Branch ~yade-dev/yade/trunk] Rev 2659: - Add relAngVel function to ScGeom (a similar version can be called from python as done for incid...

2011-01-24 Thread Chiara Modenese
Bruno,

adding the incremental formulation to CFLaw is not a problem if not that
there would be the creep behaviour to consider and am not sure to have time
to see how it works and also test it. Or maybe I could add the incremental
way in any case but specifying (via invalid arguments for instance) that
when the incremental formulation is included for twist and rolling moments
then no creep (both in shear and twist) would be applied? This way it would
be possible to embody in this law the case per which we limit both twist and
rolling moment correctly (since with quaternions it would be quite messy to
do the same). I would write documentation about that too. Just let me know
what you think. I would not want to mess up this law. On the other hand if
somebody needs a linear law with rolling and twist limited to some plastic
value (not so easy to do it with quaternions), it would be nice to have it
using the incremental formulation (easy to see/test).

Chiara

On 19 January 2011 08:30, Bruno Chareyre bruno.chare...@hmg.inpg.fr wrote:


@Bruno: I would like to add the incremental formulation to CFLaw, how
 do you suggest to do that? Maybe I can use a bool something like
 (useIncrementalForm)?
 Sure!

 Bruno


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Re: [Yade-dev] [Branch ~yade-dev/yade/trunk] Rev 2659: - Add relAngVel function to ScGeom (a similar version can be called from python as done for incid...

2011-01-24 Thread Bruno Chareyre
Hi,

You can disable creep if incremental is used, of course. No problem with
that.
Actually, including creep is easier in the incremental formulation (like
everything else). I could include it eventually.

Bruno



On 24/01/11 17:39, Chiara Modenese wrote:
 Bruno,

 adding the incremental formulation to CFLaw is not a problem if not
 that there would be the creep behaviour to consider and am not sure to
 have time to see how it works and also test it. Or maybe I could add
 the incremental way in any case but specifying (via invalid arguments
 for instance) that when the incremental formulation is included for
 twist and rolling moments then no creep (both in shear and twist)
 would be applied? This way it would be possible to embody in this law
 the case per which we limit both twist and rolling moment correctly
 (since with quaternions it would be quite messy to do the same). I
 would write documentation about that too. Just let me know what you
 think. I would not want to mess up this law. On the other hand if
 somebody needs a linear law with rolling and twist limited to some
 plastic value (not so easy to do it with quaternions), it would be
 nice to have it using the incremental formulation (easy to see/test).

 Chiara

 On 19 January 2011 08:30, Bruno Chareyre bruno.chare...@hmg.inpg.fr
 mailto:bruno.chare...@hmg.inpg.fr wrote:


@Bruno: I would like to add the incremental formulation to
 CFLaw, how do you suggest to do that? Maybe I can use a bool
 something like (useIncrementalForm)?
 Sure!

 Bruno


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Re: [Yade-dev] [Branch ~yade-dev/yade/trunk] Rev 2659: - Add relAngVel function to ScGeom (a similar version can be called from python as done for incid...

2011-01-19 Thread Bruno Chareyre

   @Bruno: I would like to add the incremental formulation to CFLaw, how do 
 you suggest to do that? Maybe I can use a bool something like 
 (useIncrementalForm)?
Sure!

Bruno


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