yade-users team mailing list archive

[Bruno Chareyre <bruno.chareyre@xxxxxxxxxxx>]

CohesiveFrictionalContactLaw is indeed the law you need, Kan.
Janek added bending/twisting moments to this contact law recently. 
Moments are only elastic for now, but implementing plasticity for 
moments would be just few lines as you have all kinematic variables 
defined already (like the relative bending/twisting rotations between 
bodies).
2 Remarks :
-you need to set collider->haveDistantPersistent=true if you want 
interactions with tensile forces (overlap<0)
-you will have to set interaction->isReal=true in the contact law if you 
want the collider to delete lost interactions (loss of contact means 
adhesive properties are lost and overlap<0, this is equivalent to 
contactForce=0).

Bruno





Jerome Duriez a écrit :
>
>>  
>> is the cohesion property of some kind of material (like rock) treated 
>> in YADE?
>> if so, how it is modeled? bonded model?
>>  
>     Hello. It depends on the contact law you use...
>     For example you could have cohesion in 
> CohesiveFrictionalContactLaw (see the files in 
> pkg/dem/Engine/StandAloneEngine/). For each interaction a value of 
> cohesion "c"  named in fact "shearAdhesion" is computed depending on a 
> caracteristic "shearCohesion" (member of the class 
> "CohesiveFrictionalRelationships) and on the radii of the bodies in 
> contact.
> This value of cohesion will then be used for computing a maximum value 
> of tangential contact force : Ftmax = c + Fn * tan(phi).
>
> Jerome
>
> ------------------------------------------------------------------------
>
> _______________________________________________
> Yade-users mailing list
> Yade-users@xxxxxxxxxxxxxxxx
> https://lists.berlios.de/mailman/listinfo/yade-users
>   


-- 
 
_______________
Chareyre Bruno
Maitre de conference

Institut National Polytechnique de Grenoble
Laboratoire 3S (Soils Solids Structures) - bureau E145
BP 53 - 38041, Grenoble cedex 9 - France
Tél : 33 4 56 52 86 21
Fax : 33 4 76 82 70 43
________________

_______________________________________________
Yade-users mailing list
Yade-users@xxxxxxxxxxxxxxxx
https://lists.berlios.de/mailman/listinfo/yade-users