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Question #703169 on Yade changed:
https://answers.launchpad.net/yade/+question/703169
Status: Open => Needs information
Jan Stránský requested more information:
Hello,
please provide a MWE [2]
> dW=sijdeij
> Etotal=Estrain+Efriction+Edamp-(Estrain_ini+Efriction_ini+Edamp_ini)
please provide how you compute / get individual components (should be
clear form the MWE)
> So I check the script [1]
it is not script, it is source code. Just a terminology note.
> And i have another question
in general, please open a new question for a new question ([2], point 5).
Here it is the same topic, just have it in mind.
> If my opinion is right, the calculation of Kn,Ks is wrong for the
clump, the calculation of the normal stress and shear stress in the
interaction are also wrong.
It depends on the definition of "wrong".
The stiffnesses are computed for sphere-sphere interaction. Regardless if it is clump or not.
It is implementation / design decision. It can be done differently, but it is done this way.
You can adjust stiffness of individual spheres to match your requirements (e.g. based on clump size).
But this problem should have no effect on energy conservation.
Cheers
Jan
[2] https://www.yade-dem.org/wiki/Howtoask
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