NUMERICAL EVALUATION OF A SANDWICH VISCOELASTIC MODEL

NUMERICAL EVALUATION OF A SANDWICH VISCOELASTIC MODEL

Felippe, W. N.; Barbosa, F. S.; Toledo, E. M.

Full Article:

Passive control has been used to reduce vibration amplitudes. This is the case of composite structures with elastic layers and viscoelastic core. These structures, which are called by sandwich, present a high damping ratio and simple application. In order to design sandwich structures, many aspects ranging from computer modeling to laboratory tests should be considered. In this paper, an approach that involves a theoretical/numerical Golla- Hughes-McTavish (GHM) based model is presented. The GHM method is applied to modeling viscoelastic materials and, consequently, to aid the design of sandwich structures. In that way, starting from dynamic properties of a viscoelastic material, numerical models are used to evaluate the behavior of sandwich structures, showing the advantages and disadvantages of the presented methodology. Comparisons with uncontrolled structures are also presented, showing the dissipative characteristics of this type of passive control.

Passive control has been used to reduce vibration amplitudes. This is the case of composite structures with elastic layers and viscoelastic core. These structures, which are called by sandwich, present a high damping ratio and simple application. In order to design sandwich structures, many aspects ranging from computer modeling to laboratory tests should be considered. In this paper, an approach that involves a theoretical/numerical Golla- Hughes-McTavish (GHM) based model is presented. The GHM method is applied to modeling viscoelastic materials and, consequently, to aid the design of sandwich structures. In that way, starting from dynamic properties of a viscoelastic material, numerical models are used to evaluate the behavior of sandwich structures, showing the advantages and disadvantages of the presented methodology. Comparisons with uncontrolled structures are also presented, showing the dissipative characteristics of this type of passive control.

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DOI: 10.5151/meceng-wccm2012-19703

Referências bibliográficas

• [1] Felippe W. N., “Aplicação de modelos teórico-computacionais para simulação do comportamento dinâmico de estruturas amortecidas através de materiais viscoelásticos”. M. Sc. Dissertation – UFJF, 2012.
• [2] Gola D. F., Hughes P. C., “Dynamics of viscoelastic structures - a time-domain, finite element formulation”. Journal of Applied Mechanics 52, 897-906, 1985.
• [3] Biot M. A., “Variational principles in irreversible thermodynamics with application to viscoelasticity”. Phisical Review 97, 1463-1469, 1955.
• [4] Barbosa F. S., “Modelagem computacional de estruturas com camadas viscoelásticas amortecedoras”. D. Sc. Thesis – COPPE/UFRJ, 2012.
• [5] Borges F., Roitman N., Magluta C., Castello D., Franciss R., “Redução de vibração através do uso de materiais viscoelásticos”, XXXII CILAMCE, 2011.

Como citar:

Felippe, W. N.; Barbosa, F. S.; Toledo, E. M.; "NUMERICAL EVALUATION OF A SANDWICH VISCOELASTIC MODEL", p-4059-4071. In: In Proceedings of the 10th World Congress on Computational Mechanics [= Blucher Mechanical Engineering Proceedings, v. 1, n. 1]. São Paulo: Blucher, 2014.
ISSN 23580828, DOI 10.5151/meceng-wccm2012-19703