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Re: [Question #295035]: Use of i.phys.unp to get null forces initially

To: yade-users@xxxxxxxxxxxxxxxxxxx
From: VG <question295035@xxxxxxxxxxxxxxxxxxxxx>
Date: Thu, 09 Jun 2016 00:52:42 -0000
Reply-to: question295035@xxxxxxxxxxxxxxxxxxxxx
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Question #295035 on Yade changed:
https://answers.launchpad.net/yade/+question/295035

VG posted a new comment:
Thanks for your response, Jerome!

If I understood it correctly, in compressive situations, if I don't
change the unp value a second time, the normal force would be given by
kn*(un-penetrationDepth). So should unp be changed after few iterations,
to get more accurate normal contact force between the spheres ?

I did not quite understand the last part: 
"unp might evolve without any user's action in situations related to tensile regime only (provided your simulation allows tensile loadings at the contact scale, and you're using fragile = false)"

I am using cohesive law and as far as I know, by default fragile = True.

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