Volume 42, Issue 3 pp. 871-882
RESEARCH ARTICLE

Upper semicontinuity of global attractors for a viscoelastic equations with nonlinear density and memory effects

Yony Raúl Santaria Leuyacc

Corresponding Author

Yony Raúl Santaria Leuyacc

Instituto de Ciências Matemáticas e de Computação, Universidade de São Paulo, São Carlos-SP, Brazil

Facultad de Ciencias Matemáticas, Universidad Nacional Mayor de San Marcos, Lima, Perú

Correspondence

Yony Raúl Santaria Leuyacc, Matemáticas e de Computação, Universidade de São Paulo, São Carlos-SP 13560-970, Brazil.

Email: [email protected]

Communicated by: K. Yildirim

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Jorge Luis Crisostomo Parejas

Jorge Luis Crisostomo Parejas

Dirección de estudios generales, Universidad San Ignacio de Loyola, Lima, Peru

Facultad de Ciencias Matemáticas, Universidad Nacional Mayor de San Marcos, Lima, Perú

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First published: 04 December 2018
Citations: 4

Abstract

This paper is devoted to showing the upper semicontinuity of global attractors associated with the family of nonlinear viscoelastic equations

urn:x-wiley:mma:media:mma5389:mma5389-math-0001
in a three-dimensional space, for f growing up to the critical exponent and dependent on ρ ∈ [0,4), as ρ→0+. This equation models extensional vibrations of thin rods with nonlinear material density ϱ(tu) = |tu|ρ and presence of memory effects. This type of problems has been extensively studied by several authors; the existence of a global attractor with optimal regularity for each ρ ∈ [0,4) were established only recently. The proof involves the optimal regularity of the attractors combined with Hausdorff's measure.

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