Abstract
In this paper, we are concerned with a nonlinear coupled viscoelastic wave equations with initial-boundary value conditions and nonlinear damping and source terms. Under suitable assumptions on relaxation functions, damping terms, and source terms, by using the energy method we proved a global nonexistence result for certain solutions with negative initial energy.
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1 Introduction
In this paper, we study the following initial-boundary value coupled viscoelastic problem:
where Ω is a bounded domain in with smooth boundary ∂ Ω, the constants , , , , , the nonlinear functions and are
in which the constants , , and p satisfies
The pioneering work of Dafermos [1] studied a one-dimensional viscoelastic problem, established some existence and asymptotic stability results for smooth monotone decreasing relaxation functions. Hrusa [2] established several global existence and asymptotic stability results for a semilinear hyperbolic Volterra equation which allows the initial data to be large. Muñoz Rivera [3] considered equations for linear isotropic viscoelastic solids of integral type, and established exponential decay and polynomial decay in a bounded domain and in the whole space, respectively. After that, many results of existence and long-term behavior have been established. Messaoudi [4] considered a nonlinear viscoelastic wave equation with source and damping terms of the form
He established blow-up result for solutions with negative initial energy and , and gave a global existence result for arbitrary initial (in the appropriate space) if . This work was later improved by Messaoudi [5].
Cavalcanti and Oquendo [6] discussed the equation
under some conditions on the relaxation function g and . They proved an exponential stability result when the relaxation function g is decaying exponentially and the function h is linear and a polynomial stability when g is decaying polynomially and h is nonlinear.
Cavalcanti et al.[7] discussed the wave equation
on a compact Riemannian manifold subject to a combination of locally distributed viscoelastic and frictional dissipations. It is shown that the solutions decay according to the law dictated by the decay rates corresponding to the slowest damping.
Muñoz Rivera and Naso [8] studied a viscoelastic systems with nondissipative kernels and showed that if the kernel function decays exponentially to zero, then the solution decays exponentially to zero. On the other hand, if the kernel function decays polynomially as , then the corresponding solution also decays polynomially to zero with the same rate of decay.
Wang and Wang [9] studied a one-dimensional wave equation with viscoelastic damping under the Dirichlet boundary condition, where the kernel was taken for the finite sum of exponential polynomials. Using the asymptotic analysis technique, the authors proved an exponential stability result. Zhao and Wang [10] considered a coupled system of an ODE and a wave equation with Kelvin-Voigt damping, where the velocity of the wave equation entered the ODE and the output was fed into the boundary of the wave equation. They presented the asymptotic expressions of eigenvalues and eigenfunctions and established the exponential stability result.
Cavalcanti et al.[11] discussed a quasilinear initial-boundary value problem:
with Dirichlet boundary condition, where , , , . An exponential decay result for and has been obtained. For and , Messaoudi and Tatar [12], [13] showed that there exists an appropriate set, called stable set, such that if the initial data are in stable set, the solution continues to live there forever, and the solution goes to zero with an exponential or polynomial rate depending on the decay rate of relaxation function.
Pata [14] studied the abstract integrodifferential equations
for , , g is a positive summable kernel, H be a real Hilbert space and the operator be a self-adjoint linear positive definite operator with domain such that the embedding is dense and compact. He introduced some new concepts such as the flatness of a kernel and gave the asymptotic result.
Lasiecka et al.[15] discussed (1.6) with , with memory kernel satisfying the inequality , where is a given continuous positive increasing and convex function such that . They developed an intrinsic method for determining decay rates of the energy given in terms of the function .
Han and Wang [16] studied the following initial-boundary value problem for a coupled system of nonlinear viscoelastic equations:
Local existence, global existence, uniqueness, and blow-up in finite time were obtained when , , , , and the initial values satisfy some conditions.
Messaoudi and Said-Houari [17] dealt with the problem (1.7) and proved a global nonexistence of solutions for a large class of initial data for which the initial energy takes positive values. Also, Said-Houari et al.[18] discussed (1.7) and proved a general decay result.
Liu [19] considered the following initial-boundary value problem for a coupled system of quasilinear viscoelastic equations:
The author used perturbed energy method to show that dissipations given by the viscoelastic terms are strong enough to ensure the decay of the corresponding energy function.
Our purpose in this paper is to give the global nonexistence of solutions for coupled viscoelastic equations with damping and source terms by using the energy method.
The present work is organized as follows. In Section 2, we give some notations and material needed for this work. Section 3 contains the main result and the proof of the global nonexistence result.
2 Preliminary
In this section, we give some notations and material needed for the proof of our result.
We shall write to denote the usual norm and to denote the usual norm .
First, we make the following assumptions on the -nonnegative and nonincreasing relaxation functions g and h:
One can easily verify for ,
and
Define
and
3 Global nonexistence result
In this section, we give the global nonexistence result and its proof.
Theorem 3.1
Assume that
and there exists constant γ such that
and
Then any solution of (1.1) cannot exist for all time.
Proof
By multiplying the first and second equation of (1.1) by and , respectively, integrating over Ω and summing them up, we obtain
Define
then
Throughout, C and represent generic positive constants.
Define
where ε is a positive constant to be determined, and
By differentiation, we obtain
Using Hölder’s inequality and Young’s inequality, we get
for , thus
By Young’s inequality, we get
and
Set
in which and will be specified later, and γ obeys
and
Then due to (3.2), we get
and
Since , , we have
thus
and
Using (3.2) and the following inequality:
we obtain, for ,
and
for .
where
and
Choose , large enough such that
For fixed and , we choose small enough such that
Then we can find positive constants and such that
Because of , there exists constant such that
On the other hand, we can choose ε even smaller so that
Furthermore, we have
Next we estimate .
We have
By Hölder’s inequality, the Sobolev embedding theorem, and Young’s inequality, we get
where
Set
thus
Furthermore, we have
and
Thus we obtain
A combination of (3.12) and (3.16) yields
where ζ is some positive constant. A simple integration gives
Thus blows up in a finite time, and the estimation of the blow-up time obeys
This completes the proof of Theorem 3.1. □
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Acknowledgements
The authors would like to express their gratitude to the anonymous referees for helpful and fruitful comments, and very careful reading on this paper. This research was partially supported by National Natural Science Foundation of China (61374089), Natural Science Foundation of Shanxi Province (2014011005-2), Shanxi Scholarship Council of China (2013-013), and Shanxi International Science and Technology Cooperation Projects (2014081026).
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Hao, J., Niu, S. & Meng, H. Global nonexistence of solutions for nonlinear coupled viscoelastic wave equations with damping and source terms. Bound Value Probl 2014, 250 (2014). https://doi.org/10.1186/s13661-014-0250-z
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DOI: https://doi.org/10.1186/s13661-014-0250-z