On 22 June 2010 11:18, Bruno Chareyre <[email protected]> wrote:
> 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. > Yes, sure in fact my question is still valid. Can I say that into the contact law? I mean, that if one of the two contact bodies is non-dynamic, then assign the mass equal to the one of the dynamic body.. > > Bruno > > chiara modenese a écrit : > >> >> >> On 21 June 2010 06:58, Sergei D. <[email protected] <mailto: >> [email protected]>> 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. >> >> _______________________________________________ >> Mailing list: >> https://launchpad.net/~yade-dev<https://launchpad.net/%7Eyade-dev> >> <https://launchpad.net/%7Eyade-dev> >> >> Post to : [email protected] >> <mailto:[email protected]> >> >> Unsubscribe : >> https://launchpad.net/~yade-dev<https://launchpad.net/%7Eyade-dev> >> <https://launchpad.net/%7Eyade-dev> >> >> More help : https://help.launchpad.net/ListHelp >> >> >> ------------------------------------------------------------------------ >> >> >> _______________________________________________ >> Mailing list: >> https://launchpad.net/~yade-dev<https://launchpad.net/%7Eyade-dev> >> Post to : [email protected] >> Unsubscribe : >> https://launchpad.net/~yade-dev<https://launchpad.net/%7Eyade-dev> >> More help : https://help.launchpad.net/ListHelp >> >> > > > -- > _______________ > Bruno Chareyre > Associate Professor > 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 : [email protected] > Unsubscribe : > https://launchpad.net/~yade-dev<https://launchpad.net/%7Eyade-dev> > More help : https://help.launchpad.net/ListHelp >
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