Dear users,
i would like to know whether the Getfem solver can handle non-convex problems,
let's say for instance a Signorini problem with a non monotone friction law
where the coefficient of friction is described by
\mu(\|\dot{\bu}_\tau\|)=(a-b)\cdot e^{-\alpha\|\dot{\bu}_\tau\|} +b, where a,b,
\alpha >0 et a\geq b.
If it is, what kind of procedure is used with the Newton iteration?
Convexification iteration ( fix the value of the coefficient of friction, in
that case, at each "Convexification " iteration to a given value depending on
the tangential slip rate found in the previous iteration) ? Something else?
Thank you in advance.
David.
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