Question #691610 on Yade changed:
https://answers.launchpad.net/yade/+question/691610

Jan Stránský posted a new comment:
Thanks for the reference.

you:
> I use E = 2e8 Pa which is at the same magnitude of the E used in the papers I 
> refer to
paper:
> Normal stiffness [kn (MPa)] 600

should have no effect on forces (assuming applied pressure is same in
both cases), just a note..

The estimation is done assuming forces are roughly the same. Which is not the 
case on figure 14.
>From 14a I am not able to read any value, just that they are significantly 
>smaller compared to maximum scale (15 kN).
14d shows two "red" 15 kN forces, than a few "smaller" forces, so let's say the 
total vertical force could be 40 kN, divided by area 90x90mm gives stress 5 
MPa..
But I just very quickly went through the article and don't know what the 
results actually shows..

Contacting authors is also an option.

cheers
Jan

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