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[Václav Šmilauer <eudoxos@xxxxxxxx>]

> I do not clearly understand the method slipToDisplacementTMax().
> We should use it only when Fs>mu*Fn?
What is mu? You give limit strain (the only argument) and changes epsT
so that it has at most this magnitude (doesn't change direction); if it
is smaller, it just returns. The way you compute limit strain depends on
your plasticity function.
> In this case we have slip, so we decrease Fs=mu*Fn, and we also have
> to make epsT like epsT = Fs/(CrossSection*E)?
Not clear to me what you mean. Have a look in
Law_Dem3DofGeom_CpmPhys_Cpm contact law, it should be self-explanatory.
> Is slipToDisplacementTMax() for the EpsT updating?
It does just that. It doesn't (cannot) change force, that is your
business.

HTH, v