| Thread Previous • Date Previous • Date Next • Thread Next |
I don't know about comparisons, but I'm sure rational thermodynamics will never point to "reference length". Current contact length (in fact branch vector OC) should be used. There is no problem of ratcheting since this is just post-processing, not entering contact laws.A choice left for the user is whether one takes the current contact length (particle distance) or the "reference" contact length (r1+r2 for ScGeom, refLength for Dem3DofGeom) as the particle distance. I don't know if some has ever compared results from both; and it has to do with the unfamous granular ratcheting as well.
On ratcheting, I just read a chapter of Mc Namara here : http://www.eyrolles.com/Accueil/Livre2/9782746229761/modelisation-numerique-discrete-des-materiaux-granulaires (english version coming soon). I couldn't be more confused, seriously... I don't understand equations, and he says what is supposed to prevent ratcheting (in my undertanding) is in fact creating it. Typos or something? I hope I can ask him directly, one day.
Bruno -- _______________ 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 ________________
| Thread Previous • Date Previous • Date Next • Thread Next |
