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Kirchhoff systems with nonlinear source and boundary damping terms
In this paper we treat the question of the non--existence of global solutions, or their long time behavior,
of nonlinear hyperbolic Kirchhoff systems.
The main $p$--Kirchhoff operator may be affected by a perturbation which behaves like $|u|^{p-2} u$ and the systems also involve
an external force $f$ and a nonlinear boundary damping $Q$. When $p=2$, we consider some problems
involving a higher order dissipation term, under dynamic boundary conditions.
For them we give criteria in order that $
|| u(t,\cdot) ||_q\to\infty$ as $t \to\infty$ along any global solution $u=u(t,x)$, where $q$ is a
parameter related to the growth of $f$ in $u$. Special subcases of $f$ and $Q$, interesting in applications, are presented in
Sections 4, 5 and 6.