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[Jan Stránský <question697593@xxxxxxxxxxxxxxxxxxxxx>]

Question #697593 on Yade changed:
https://answers.launchpad.net/yade/+question/697593

    Status: Open => Answered

Jan Stránský proposed the following answer:
> how can I write code for Normal Force

one option is O.forces.setPermF [2]

> how can I write code for Friction

mat = FrictMat(...,frictionAngle=0.5) # [3]
O.materials.append(mat)

> which contact law to use as I am new to this?

For start, use the "most basic" Cundall-Strack law [4].
Once you get familiar, you can add different parameters and/or use different contact models

Cheers
Jan

[2] https://yade-dem.org/doc/yade.wrapper.html#yade.wrapper.ForceContainer.setPermF
[3] https://yade-dem.org/doc/yade.wrapper.html#yade.wrapper.FrictMat
[4] https://yade-dem.org/doc/user.html#basic-dem-model

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