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Re: [Question #158839]: control of pressure

 

Question #158839 on Yade changed:
https://answers.launchpad.net/yade/+question/158839

    Status: Open => Answered

jduriez proposed the following answer:
> Chareyre proposed the following answer:

> The algorithm uses stiffness of contacts, so it matters if the law is
> linear or not.

But the algorithm uses stiffness at iteration i : k_i, to compute
displacements of the wall that should give the wanted correction
dSigmaCorr

Once walls are moved, at the following time step, there might be
different stiffnesses (= k_{i+1}) leading to a real increment of sigma
which might be different from wanted dSigmaCorr : more and more
different as k_{i+1} is more and more different from k_i.

Don't you think there might be something like that ? At least
"theorytically" ? Probably differences between k_{i+1} and k_i are
generally small, but maybe not always ?

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