yade-users team mailing list archive

[Václav Šmilauer <eudoxos@xxxxxxxx>]

Hi, tje stiffness as you write is only defined as such in one particular
class (Ip2_FrictMat_FrictMat_FrictPhys). You find some information in
its documentation at
https://yade-dem.org/sphinx/yade.wrapper.html#yade.wrapper.Ip2_FrictMat_FrictMat_FrictPhys

Make sure that you read
https://yade-dem.org/sphinx/introduction.html#architecture-overview in
particular, so that you understand how is an InteractionPhysics (which
then contains the Kn stiffness) derived from Materials of 2 bodies that
enter in contact. So for you question what is E, it is
https://yade-dem.org/sphinx/yade.wrapper.html#yade.wrapper.FrictMat
which inherits ElastMat, which in turn defines the "young" attribute
(https://yade-dem.org/sphinx/yade.wrapper.html#yade.wrapper.ElastMat.young)

Cheers, Václav



> Dear all,
> In the YADE code the normal contact stiffness is defined as
> --------------------
> Real Kn = 2*Ea*Da*Eb*Db/(Ea*Da+Eb*Db);
> --------------------
> What is E? Is it stiffness of particle or young's modulus of
> particle. 
> 
> I did not get the theoretical derivation of this expression...
> Could you tell me where I will get the exact reference.
> Thank you.
> 
> Md. Abu Sayeed 
> Soil Mechanics Laboratory,
> Saitama University, Japan
> +818036909189
> 
> _______________________________________________
> Mailing list: https://launchpad.net/~yade-users
> Post to     : yade-users@xxxxxxxxxxxxxxxxxxx
> Unsubscribe : https://launchpad.net/~yade-users
> More help   : https://help.launchpad.net/ListHelp