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[Robert Caulk <question691009@xxxxxxxxxxxxxxxxxxxxx>]

Question #691009 on Yade changed:
https://answers.launchpad.net/yade/+question/691009

    Status: Open => Answered

Robert Caulk proposed the following answer:
Hello,

Thanks a lot for the clear description and the minimal working example
:-).

>FWIW, The fact that et is ignored is mentioned in the documentation for
Law2_ScGeom_ViscElPhys_Basic, but the fact that you get elastic behavior
if et is omitted is not.

Can you please link to where it says this? I cannot see it.

I admit I have not used this law but looking at the source code, et is
used to compute cs and ks [1], which are both used to compute the torque
[2].

Possible reasons you see no effect:
Your frictionAngle in your script is zero which might mean you never reach [3]. 
It is not immediately apparent that you would activate any shear in your example script. 

Cheers,

Robert

[1]https://gitlab.com/yade-dev/trunk/-/blob/master/pkg/dem/ViscoelasticPM.cpp#L279
[2]https://gitlab.com/yade-dev/trunk/-/blob/master/pkg/dem/ViscoelasticPM.cpp#L66
[3]https://gitlab.com/yade-dev/trunk/-/blob/master/pkg/dem/ViscoelasticPM.cpp#L164

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