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[Luc Scholtès <question668286@xxxxxxxxxxxxxxxxxxxxx>]

Question #668286 on Yade changed:
https://answers.launchpad.net/yade/+question/668286

    Status: Open => Answered

Luc Scholtès proposed the following answer:
Hi Jacopo,

Changing the "young" and "poisson" in the material functor will change
the stiffness of the newly created contacts only. If you want to change
the stiffnesses of the existing ones, I believe that you have to loop
over the interactions and modify the attributes of their
Ip2_FrictMat_FrictMat_FrictPhys (for i in interactions:
i.phys.kn=newValue). You should be able to do that but you should also
consider opening a new question since this one is not related anymore to
the initial one "save in txt.file a packing of spheres".

Luc

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