Experimental and numerical evaluation of viscoelastic sandwich beams
Felippe Filho, Waldir Neme, Barbosa, Flávio de Souza, Roitman, Ney, Magluta, Carlos, Borges, Flávia Carolina
REM, Int. Eng. J.
DATA DE PUBLICAÇÃO
Abstract Viscoelastic materials can dissipate a large amount of energy when subjected to cyclic shear deformations, but they have low bearing capacity. Therefore they are often employed as a damping layer in sandwich structures. These sandwich structures present a high damping ratio and simple application. In order to design sandwich structures, many aspects ranging from computer modeling to laboratory testing should be considered. In this study, a test set of experiments were performed and results are compared with a numerical GHM (Golla, Hughes and Mc Tavish method) based model, in order to establish a method to support viscoelastic sandwich beam design. In this way, starting from the dynamic properties of a viscoelastic material, a numerical model is used to evaluate the behavior of these structures. Comparisons with uncontrolled structures are also presented, showing the dissipative characteristics of this passive control.
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