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Master's Dissertation
DOI
https://doi.org/10.11606/D.55.2016.tde-14102016-143012
Document
Author
Full name
Paulo Nicanor Seminario Huertas
E-mail
Institute/School/College
Knowledge Area
Date of Defense
Published
São Carlos, 2015
Supervisor
Committee
Fu, Ma To (President)
Costa, Éder Rítis Aragão
Nascimento, Marcelo José Dias
Title in Portuguese
Atratores globais para uma equação viscoelástica não linear com história
Keywords in Portuguese
Atratores globais
Equação viscoelástica com história
Equações da onda
Equações diferenciais parciais
Abstract in Portuguese
Neste trabalho estudamos uma classe de equações de ondas da forma ∣∂tu∣pttu - Δ∂ttu - αu + ∫0µ(s)Δu(t - s)ds +F(u) = h, definida num domínio limitado de R3, com condição de fronteira de Dirichlet e parâmetros α, ρ >0. Tais equações modelam problemas de viscoelasticidade não linear e têm sido estudados por diversos autores. Aqui, apresentamos um teorema de existência, unicidade e dependência contínua em relação aos dados iniciais, para soluções fracas, como discutido por Conti, Marchini & Pata (2014). Em seguida provamos um teorema novo sobre a existência de atratores globais para o sistema dinâmico associado ao problema, explorando tão somente a dissipação dada pelo termo de memória. Tal resultado generaliza substancialmente o trabalho pioneiro de Araújo, Ma & Qin (2013).
Title in English
Global attractors for a viscoelastic equation nonlinear with history
Keywords in English
Equation viscoelastic with history
Equations partial differential
Global attracts
Wave equations
Abstract in English
In this work we study a class of wave equations of the form ∣∂tu∣pttu - αΔu + ∫0µ(s)Δu(t - s)ds +f(u) = h, defined in a bounded domain of R3, with Dirichlet boundary condition and parameters α, ρ > 0. Such equations model problems from nonlinear visco-elasticity and have been considered by several authors. Here, we prove the well-posedness of the problem, as discussed by Conti, Marchini & Pata (2014). Next, we prove a new result on the existence of global attractors for the dynamical system generated by the problem, by exploring the dissipation the memory term only. The result extends substantially the pioneering work by Araújo, Ma & Qin (2013).
 
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Publishing Date
2016-10-20
 
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