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[Jerome Duriez <duriez@xxxxxxxxxxxxxxx>]

Hello,

You can find this plastic threshold for the moment in 
Law2_ScGeom_NormalInelasticityPhys_NormalInelasticity (lines 193 to 202 
of the .cpp). For what concerns the "cohesion-friction model", I assume 
that you speak of Law2_ScGeom_CohFrictPhys_ElasticPlastic, which I know 
less. But a quick look to the .cpp gives me the same feeling than yours, 
that the moment is always elastic.

Jerome

Le 16/09/2010 12:40, ?????? a ??crit :
> Hello,
>
> I found the moment calculation in cohesion-friction model is different 
> from the traditional algorithm which is listed in the 
> paper(Jean-Patrick Plassiard etl, A spherical discrete element 
> model:calibration procedure and incremental response, 209; N. Belheine 
> etl, Numerial simulation of drained triaxial test using 3d discrete 
> element modeling; Rolling resistance at contacts in simulation of 
> shear band development by DEM). In the traditional algorithms, the 
> slider for rolling starts working if the moment exceeds a value of 
> "eta* Normal force". However, I cannot find the related code described 
> it. If no any condition to relax the moment. then the moment will act 
> all the time. I think it should be wrong. Maybe I haven't found the 
> right file. May I have your help? Thank you.
>
> Best
> Liqing