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Re: [Question #681383]: problem of the unit of normal force in Law2_PolyhedraGeom_PolyhedraPhys_Volumetric

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From: Bruno Chareyre <question681383@xxxxxxxxxxxxxxxxxxxxx>
Date: Wed, 12 Jun 2019 14:07:42 -0000
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Question #681383 on Yade changed:
https://answers.launchpad.net/yade/+question/681383

    Status: Open => Answered

Bruno Chareyre proposed the following answer:
Hi, I'm not expert of Polyhedra code but it seems you are trying to question a constitutive assumption mainly.
If someone assume that Fn is proportional to intersection's volume then Fn=k*volume, and it _follows_ that k is in N/m^3.
You can't assume upfront that kn is a pressure regardless of the constitutive framework (usually it's not, anyway, it tends to be a force per length).
Bruno

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