Question #211358 on Yade changed:
https://answers.launchpad.net/yade/+question/211358
Status: Open => Answered
Chareyre proposed the following answer:
Taking your porcelain ball and steel plate and making a static
compression test on them, you could measure a relation between force and
displacement. This would be the contact behaviour.
In order to reproduce the experiments, you need to at least reproduce
this contact behavior in the numerical model (still, it is neglecting
viscous effects and other things, but at least it is a rational first
step).
I don't understand why you think Cundall&Strack model is relevant in your case
(it is not, most probably) since you never defined precisely what contact
behavior you have to simulate.
Neither do I understand why the force in the normal direction would not be the
normal force...
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