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Shock and Vibration
Volume 2017, Article ID 7842413, 16 pages
https://doi.org/10.1155/2017/7842413
Research Article

Dynamic Response of Soft Core Sandwich Beams with Metal-Graphene Nanocomposite Skins

1ISEL, IPL, Instituto Superior de Engenharia de Lisboa, Av. Conselheiro Emídio Navarro 1, 1959-007 Lisboa, Portugal
2LAETA, IDMEC, Instituto Superior Técnico, Universidade de Lisboa, Av. Rovisco Pais 1, 1049-01 Lisboa, Portugal

Correspondence should be addressed to M. A. R. Loja; tp.lpi.lesi.med@ajolailema

Received 9 October 2016; Revised 21 January 2017; Accepted 8 March 2017; Published 13 April 2017

Academic Editor: Kenneth J. Loh

Copyright © 2017 M. A. R. Loja. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

Sandwich structures are able to provide enhanced strength, stiffness, and lightweight characteristics, thus contributing to an improved overall structural response. To this sandwich configuration one may associate through-thickness graded core material properties and homogeneous or graded properties nanocomposite skins. These tailor-made possibilities may provide alternative design solutions to specific problem requisites. This work aims to address these possibilities, considering to this purpose a package of three beam layerwise models based on different shear deformation theories, implemented through Kriging-based finite elements. The viscoelastic behaviour of the sandwich core is modelled using the complex method and the dynamic problem is solved in the frequency domain. A set of case studies illustrates the performance of the models.