New question #593682 on Yade:
https://answers.launchpad.net/yade/+question/593682

Hello Yade users,

I have a question about the calculation of the normal stiffness kn.
In fact, i read the Yade's DEM formulation ( 
https://yade-dem.org/doc/formulation.html ) and i find the kn calculation 
method.
My question is : why you suppose that ki=Ei*li in the second line of the proof 
? 
is there a formulation which establish the link between the elasticity module 
and the stifnness ? if yes which is its name ?
The origin of my question is that the stiffness (kn) unit is N/m or MPa/m but 
with the kn formulation proposed in the DEM formulation the stiffness unit (kn) 
become MPa.m and i don't understand.


Best regards.
Jabrane. 

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