A clump bonded with other spheres

Hello,

Welcome to Yade!

If I understand you correctly, you want to make a clump cloud (makeClumpCloud [1]). If you would like the clump cloud to follow a cohesive model, you will want to look through CPM [4], JCFPM [5], CohFrict [6]. Your material model selection depends on what type of failure model you are after. After you've created your clump cloud, running the triaxial test follows the same procedure as any other packing type. I am hesitant to show you [2] since it uses the deprecated TriaxialCompressionEngine. Instead, you would simply use your clump cloud with TriaxialStressController [3].

Cheers,

Robert

[1]https://yade-dem.org/doc/yade.pack.html#yade._packSpheres.SpherePack.makeClumpCloud
[2] https://github.com/yade/trunk/blob/master/examples/clumps/triax-basic-with-clumps.py
[3]https://github.com/yade/trunk/blob/master/examples/triax-tutorial/script-session1.py
[4]https://yade-dem.org/doc/yade.wrapper.html#yade.wrapper.CpmMat
[5]https://yade-dem.org/doc/yade.wrapper.html#yade.wrapper.JCFpmMat
[6]https://yade-dem.org/doc/yade.wrapper.html#yade.wrapper.CohFrictMat

Hi Robert,

Thanks a lot for you response.

I‘m sorry that my description of the model is not clear enough. I knew that Clump is a rigid body that cannot break, so I chose to use clump(a group of overlapping spheres) to represent the complex shape of the particles i want to create, and two additional small spheres bonded at the surface of the clump by using CohFricMat, so particle breakage is equivalent to the separation of these small spheres from clump.
I'm trying to create a 'template' of the particle described above(Similar to clumpTemplate). In this case, I can use this particle to pack and perform a triaxial test. Of course, these are just my ideas, I don't know if Yade can implement my ideas, or have a simpler way to achieve them. Can you give me some advice?
looking forward to your reply.

Cheers,

Yang

Thanks Bruno Chareyre, that solved my question.