how to model rock joints

First of all you should choose the constitutive law for your model.
There is RockPM, but I would not recommend you to use it
without testing and modification.

Anton

Hi Henry,

What exactly do you want to study?

The behaviour of the joint as described in here: http://www.sciencedirect.com/science/article/pii/S1365160910001784

or the behaviour of the jointed rock mass as described in here: http://www.sciencedirect.com/science/article/pii/S1365160912000391

Luc

Hello Henry,

Paying enough attention to these two articles will be necessary to catch the details, but, shortly, the idea of the first article (whose I'm one of the authors) is to simulate (only) one rock joint which is infilled, with a granular material. Particles of the model represent this infill material.

In the second article (Luc's work) the DEM is modified so that the interactions between some particles correspond to a (relatively simple) behaviour of a planar joint. The particles correspond then to the rock mass, but with some planar joints inbetween.

The CohesiveFrictional contact law may be a good starting point (short
name Law2_ScGeom6D_CohFrictPhys_CohesionMoment).
It is relatively general.

https://www.yade-dem.org/doc/yade.wrapper.html#yade.wrapper.Law2_ScGeom6D_CohFrictPhys_CohesionMoment

Bruno

Dear all,
      I'm using Yade to study the rock mechanics.
       if I know the position of a Joint, how can i applyt the joint law (is Law2_ScGeom6D_NormalInelasticityPhys_NormalInelasticity ?) on the particles around the joint?
    Thanks a lot!
 Henry

Dear Henry,

NormalInelasticity is adapted to model the behaviour of the granular material that you can find in rock joint (also called gouge).

Is it really what you want to model?

Did you actually have a look at the papers I mentionned in a previous answer?

Cheers,

Luc

Dear Luc,
   Thanks for your help. Yes, I have a look at the papers you mentionned. However, my question is how can I define the contact law on the particles between two particles arround the joint?
  For example, Fig.6(a) in Ref [1], how can i identify the particles arround the joint and aplly the joint contact law on these particles?

[1] Modelling progressive failure in fractured rock masses using a 3D discrete element method
       http://www.sciencedirect.com/science/article/pii/S1365160912000391

Thanks a lot.
Henry

Is there anyone can help me? Thanks a lot.
 Henry

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