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Effective elastic properties of planar SOFCs: a non-local dynamic homogenization approach

Bacigalupo, Andrea and Morini, Lorenzo and Piccolroaz, Amdrea Effective elastic properties of planar SOFCs: a non-local dynamic homogenization approach. International Journal of Hydrogen Energy, 39 (27). 15017 - 15030. ISSN 0360-3199 (2014)

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Abstract The focus of the article is on the analysis of effective elastic properties of planar Solid Oxide Fuel Cell (SOFC) devices. An ideal periodic multi-layered composite (SOFC-like) reproducing the overall properties of multi-layer {SOFC} devices is defined. Adopting a non-local dynamic homogenization method, explicit expressions for overall elastic moduli and inertial terms of this material are derived in terms of micro-fluctuation functions. These micro-fluctuation functions are then obtained solving the cell problems by means of finite element techniques. The effects of the temperature variation on overall elastic and inertial properties of the fuel cells are studied. Dispersion relations for acoustic waves in SOFC-like multilayered materials are derived as functions of the overall constants, and the results obtained by the proposed computational homogenization approach are compared with those provided by rigorous Floquet–Bloch theory. Finally, the influence of the temperature and of the elastic properties variation on the Bloch spectrum is investigated.

Item Type: Article
Identification Number: 10.1016/j.ijhydene.2014.06.104
Uncontrolled Keywords: Solid oxide fuel cells; Second-gradient continuum; Dynamic homogenization; Dispersive waves
Subjects: T Technology > TJ Mechanical engineering and machinery
Research Area: Computer Science and Applications
Depositing User: Ms T. Iannizzi
Date Deposited: 21 Jan 2015 09:53
Last Modified: 11 Mar 2016 12:17
URI: http://eprints.imtlucca.it/id/eprint/2544

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