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Loss behavior of viscoelastic sandwich structures: A statistical-continuum multi-scale approach

Koutsawa, Yao, Azoti, Wiyao, Belouettar, Salim, Martin, Rodolphe and Barkanov, Evgeny (2012) Loss behavior of viscoelastic sandwich structures: A statistical-continuum multi-scale approach. Composite Structures, 94 (4). 1391 - 1397. ISSN 0263-8223

Item Type: Article

Abstract

This work presents a multi-scale model of viscoelastic constrained layer damping treatments for vibrating plates/beams. The approach integrates a finite element (FE) model of macro-scale vibrations and a statistical-continuum homogenization model to include effects of micro-scale structure and properties. The statistical-continuum homogenization model makes the micro- to macro-scale transition to approximate the effective behavior of the heterogeneous core by using n-point probability functions. A simple sound transmission model is used to show the effect of material microstructure on the sound transmission loss of the sandwich structure. The damping behavior resulting from the presence of voids and negative stiffness regions in the core material is modeled. This study clearly shows that, it is of high interest to research either material structures or processing techniques which lead to negative stiffness behavior. The results also poignantly show that the proposed multi-scale model yields insight on heterogeneous material behavior leading to increased damping properties and ultimately enhances the ability to design sandwich beam/plates.

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More Information

Depositing User: Wiyao Azoti

Identifiers

Item ID: 5796
Identification Number: https://doi.org/10.1016/j.compstruct.2011.11.003
ISSN: 0263-8223
URI: http://sure.sunderland.ac.uk/id/eprint/5796
Official URL: http://www.sciencedirect.com/science/article/pii/S...

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Catalogue record

Date Deposited: 15 Dec 2015 10:02
Last Modified: 02 Jul 2019 09:10

Contributors

Author: Yao Koutsawa
Author: Wiyao Azoti
Author: Salim Belouettar
Author: Rodolphe Martin
Author: Evgeny Barkanov

University Divisions

Faculty of Technology > School of Computer Science

Subjects

Engineering > Mechanical Engineering

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