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Clump bond breaking - constitutive law

Asked by Dominik Boemer

Hello everybody,

I would like to create clumps (of spheres) with a viscoelastic contact law (like Law2_ScGeom_ViscElPhys_Basic, linear spring-damper in normal and tangential direction + Coulomb friction) and bonds between the spheres (of a clump) that can break if the stress exceeds a defined threshold.

1. Which law would be the best in my case? Until now, I found the following:
- Law2_ScGeom6D_CohFrictPhys_CohesionMoment (no viscous behaviour)
- Law2_ScGeom6D_InelastCohFrictPhys_CohesionMoment (implementation finished? documentation?)

2. Are there other constitutive laws which would be better suited to my objectives?

3. On [1] are some videos (second and the third) of clump breakings. Does anyone know, if the scripts of these examples still exist and where I could find them? Which law did they use?

[1] https://yade-dem.org/wiki/Processing_machines

Thanks in advance,
Dominik

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Launchpad Janitor (janitor) said : 		#1

This question was expired because it remained in the 'Open' state without activity for the last 15 days.

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Anton Gladky (gladky-anton) said : 		#2

It was not a clump, but a "rock particle model" [1], [2] (removed from the trunk a couple of years ago).
It is some kind of cohesive particle models. Feel free to look into it, and if you will want to maintain/develop
this code, we can reintroduce it.

[1] https://github.com/yade/trunk/blob/0.97/pkg/dem/RockPM.hpp
[2] https://github.com/yade/trunk/blob/0.97/pkg/dem/RockPM.cpp

Cheers

Anton