Static and dynamic characterization of composition cork for sandwich beam cores
Composition cork can be regarded as an interesting solution for light-damped sandwich panels. Despite the emergent interest on these materials for structural applications, there is a lack of information concerning its static and dynamic properties. This study presents a comparative study on a set of different experimental characterization methodologies applied on a selected agglomerated cork for vibration damping applications. The obtained results support the assumption of an air spring/viscous-based mechanism ruling the low-frequency behaviour of these materials. This assumed behaviour is a result from the observations of the cellular microstructure of natural and composition corks. Indicative values for the Young’s modulus, storage modulus and loss factor are provided as results from this study. In addition, a multilayer beam finite element, based on a mixed formulation, is proposed to be applied in an inverse characterization methodology and to be used also for the experimental validation tasks. The finite element proved to be efficient and accurate.
KeywordsStorage Modulus Complex Modulus Sandwich Panel Sandwich Beam Inverse Identification
The authors gratefully acknowledge the Fundação para a Ciência e a Tecnologia (FCT) of the Ministério da Ciência e da Tecnologia of Portugal for the financial supported under the research project PTDC/EME-PME/66741/2006. Authors also acknowledge Corticeira Amorim Indústria SA company for providing the composition cork used in this study.
- 1.Nashif AD, Jones DIG, Henderson JP (1985) Vibration damping, 1st edn. John Wiley & Sons, New YorkGoogle Scholar
- 2.Jones DIG (2001) Handbook of viscoelastic vibration damping, 1st edn. John Wiley & Sons, New YorkGoogle Scholar
- 5.Santos Silva J, Moreira RAS, Dias Rodrigues J (2010) J Sandwich Struct Mater. doi: 10.1177/1099636209104538
- 6.Dias Rodrigues J, Moreira RAS (2007) Sandwich structures with cork compound layers: a new vibration control solution. POCI/EME/61967/2004 Final Report, FEUP/UAGoogle Scholar
- 8.Fortes MA, Rosa ME, Pereira H (2004) A cortiça. IST Press, LisboaGoogle Scholar
- 9.Gibson LJ, Ashby MF (1997) Cellular solids, 2nd edn. Cambridge University Press, CambridgeGoogle Scholar
- 11.Pereira H (2007) Cork: biology, production and uses, 1st edn. Elsevier, AmsterdamGoogle Scholar
- 12.Castro O, Silva JM, Devezas T, Silva A, Gil L (2010) Mater Des 31(1):425Google Scholar
- 14.Anjos O, Pereira H, Rosa ME (2006) II Latin American IUFRO Congress, La Serena, Chile, October 23–27, 2006 (In Cd Rom)Google Scholar
- 24.Cook RD, Malkus DS, Plesha ME (1989) Concept and applications of finite element analysis, 3rd edn. John Wiley & Sons (International Edition) Google Scholar
- 27.Ross D, Ungar EE, Kerwin EM Jr (1959) Damping of plate flexural vibrations by means of viscoelastic laminae, Structural Damping. ASME Publication, New York, p 49Google Scholar
- 30.Pascual R, Golinval JC, Razeto M (1997) Proceedings of the 15th Int. Modal Analysis Conference (IMAC XV), Orlando, FL, USA, p 587Google Scholar