yade-users team mailing list archive

[Bruno Chareyre <bruno.chareyre@xxxxxxxxxxx>]

Hi all,

Chiara asked me to summarize what happened to ratcheting in r2608.
In short, many 360° turns applied on contacts were generating artifacts,
see http://www.mail-archive.com/yade-dev@xxxxxxxxxxxxxxxxxxx/msg05844.html.
Thinking about that, I realized that the (R1*spin1 - R2*spin2) computed
when avoidRatcheting=true was not
ojective, and it was the source of the artifacts. The fix adpoted in r2608
(alpha) is similar to what is proposed by McNamara et al. (note :
McNamara doesn't mention objectivity issues IIRC, only ratcheting

I warmly recommend this paper cited in Sceom comments, it explains more
than I could in emails.

Cheers.

Bruno