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Characterisation by Inverse Techniques of Elastic, Viscoelastic and Piezoelectric Properties of Anisotropic Sandwich Adaptive Structures

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Abstract

In this article we present recent developments regarding parameter estimation in sandwich structures with viscoelastic frequency dependent core and elastic laminated skin layers, with piezoelectric patch sensors and actuators bonded to the exterior surfaces of the sandwich. The frequency dependent viscoelastic properties of the core material are modelled using fractional derivative models, with unknown parameters that are to be estimated by an inverse technique, using experimentally measured natural frequencies and associated modal loss factors. The inverse problem is formulated as a constrained minimisation problem, and gradient based optimization techniques are employed. Applications are presented and discussed, focused on the identification of viscoelastic frequency dependent core material properties.

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Acknowledgements

The authors thank the financial support of FCT(Portugal), through POCTI and POCI(2010)/FEDER, and CNPq(Brazil), CAPES(Brazil), and FAPERJ(Brazil).

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Authors and Affiliations

  1. IDMEC/IST, Technical University of Lisbon, Av. Rovisco Pais, 1049-001, Lisbon, Portugal

    Aurelio L. Araújo, Cristovao M. Mota Soares & Carlos A. Mota Soares

  2. COPPE, Federal University of Rio de Janeiro, Caixa Postal 68503, 21945-970, Rio de Janeiro, Brazil

    Jose Herskovits

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  1. Aurelio L. Araújo
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  2. Cristovao M. Mota Soares
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  3. Carlos A. Mota Soares
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  4. Jose Herskovits
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Correspondence to Aurelio L. Araújo.

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Araújo, A.L., Mota Soares, C.M., Mota Soares, C.A. et al. Characterisation by Inverse Techniques of Elastic, Viscoelastic and Piezoelectric Properties of Anisotropic Sandwich Adaptive Structures. Appl Compos Mater 17, 543–556 (2010). https://doi.org/10.1007/s10443-010-9142-2

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