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Static and dynamic characterization of composition cork for sandwich beam cores

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Abstract

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.

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Acknowledgements

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.

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Authors and Affiliations

  1. Departamento de Engenharia Mecânica, Universidade de Aveiro, Campus Santiago, 3810-193, Aveiro, Portugal

    R. A. S. Moreira & F. J. Q. de Melo

  2. Faculdade de Engenharia da Universidade do Porto, R. Dr. Roberto Frias, 4050-465, Porto, Portugal

    J. F. Dias Rodrigues

Authors
  1. R. A. S. Moreira
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  2. F. J. Q. de Melo
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  3. J. F. Dias Rodrigues
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Corresponding author

Correspondence to R. A. S. Moreira.

Appendix: Composition cork description

Appendix: Composition cork description

Manufacturer’s specification:

Manufacturer::

ACC—Amorim Cork Composite (Portugal)

Material reference::

CAI 8003

Binding agent::

Polyurethane

Grain size::

Small (size range: 0.5–1.0 mm)

Grain density::

Low density

Specific weight::

170–240 kg/m3

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Moreira, R.A.S., de Melo, F.J.Q. & Dias Rodrigues, J.F. Static and dynamic characterization of composition cork for sandwich beam cores. J Mater Sci 45, 3350–3366 (2010). https://doi.org/10.1007/s10853-010-4356-0

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