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Is it possible to use ViscElMat with cohesion?

Asked by paula

Hi there!
I want to know if it's possible to use the model ViscElMat with cohesion and how.
I've tried to used CohFrictMat but it didn't work as I wished.
I'm simulating a transfer chute (1), something like the picture. And when the material goes to the next belt, it doesn't move and a stack of material is formed.
Hope someone could help me.

(1) http://www.cfdem.com/media/DEM/wear/wear_transferchute.png

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Jérôme Duriez (jduriez) said : 		#1

Hi,

I've never used ViscElMat myself but the name, corresponding to a visco-elastic behavior as explained in the doc [1], does not suggest it includes cohesion..

Indeed, tensile interactions are not possible within this model [2,3], and the maximum shear force is defined by a Coulombian threshold [4], without any cohesion in shear as well

[1] https://yade-dem.org/doc/yade.wrapper.html#yade.wrapper.ViscElMat
[2] https://github.com/yade/trunk/blob/6d4a0d1689c6bad2dbdd6e27d1653418f7fc6498/pkg/dem/ViscoelasticPM.cpp#L71
[3] https://github.com/yade/trunk/blob/6d4a0d1689c6bad2dbdd6e27d1653418f7fc6498/pkg/dem/ViscoelasticPM.cpp#L108
[4] https://github.com/yade/trunk/blob/6d4a0d1689c6bad2dbdd6e27d1653418f7fc6498/pkg/dem/ViscoelasticPM.cpp#L125 up to L132

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paula (palitaaa) said : 		#2

Thanks for your help Jérôme.

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