A finite element model for sandwich viscoelastic beams: Experimental and numerical assessment |
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Authors: | FS Barbosa MCR Farage |
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Institution: | aFederal University of Juiz de Fora, Faculty of Engineering, Graduation Program in Computational Modelling, Campus Universitário de Martelos, CEP 36036-330, Juiz de Fora, MG, Brazil |
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Abstract: | Among the passive control systems for attenuation of vibrations in structures, those that use viscoelastic materials as a damping core in laminated-plate-like components are focused herein. In the present work an assessment of a time-domain formulation for numerical modelling of viscoelastic materials is made. This formulation, which is called Golla–Hughes method (GHM), is based on a second-order time-domain realization of Laplace-domain motion equations. The GHM parameters used in the characterization of a viscoelastic material are experimentally determined and a sandwich GHM-based finite element model is presented and validated through numerical comparisons with classic formulation results. Finally, a time-domain simulation of an experimentally tested sandwich beam is carried out. |
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