yade-dev team mailing list archive

[Bruno Chareyre <bruno.chareyre@xxxxxxxxxxx>]

If one body is not dynamic, is there a reason to define an "equivalent" 
mass? I would say it this case m=m1, which is what Sergei find for 
infinite mass too.

Bruno

chiara modenese a écrit :
> On 21 June 2010 06:58, Sergei D. <sj2001@xxxxxxxxx 
> <mailto:sj2001@xxxxxxxxx>> wrote:
>
>     .
>     > Q: I need a sort of equivalent mass to do it, which is something
>     like
>     > (as in PFC):
>     > m=m1*m2/(m1+m2)
>     > the only thing is that if the contact is between a ball and a
>     box (say
>     > in the triaxial) then this would not work. Is it possible in the
>     contact
>     > law to discern between bodies shape? Maybe simply pointing to
>     shape.get()?
>
>     Why it will not work?
>     m=m1*m2/(m1+m2) is 1/m=1/m1+1/m2,
>     so if box have infinity mass (m2) it will 1/m=1/m1, for example. No?
>
> Hi Sergei, it will not work simply because in the TT boxes have zero 
> mass. So in that case it would be necessary to set the equivalent mass 
> equal just to the one of the contact sphere (I think).
>
>
>     --
>     Best regards,
>     Sergei D.
>
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--
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Bruno Chareyre
Associate Professor
Grenoble INP
Lab. 3SR
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