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Non-linear thermal response of sandwich panels with a flexible core and temperature dependent mechanical properties

Record type: Article

The paper presents the geometrical non-linear response of unidirectional sandwich panels with a “soft” core subjected to thermally induced deformation type of loading, which may be fully distributed or localized. The mathematical formulation incorporates the effects of the flexibility of the core in the vertical direction as well as the effects of the temperature dependent mechanical properties of the constituent materials on the non-linear behavior. The non-linear governing equations are derived using a variational approach following the approach of the high-order sandwich panel theory (HSAPT). The features of the non-linear response are presented through a numerical study that discusses the effects of localized reinforced cores and the mismatch of the coefficients of thermal expansion of the constituent core materials; the effects of continuous panels in the presence of immovable supports; the effects of localized thermal loading with temperature dependent material properties and, finally, the interaction of mechanical and thermal loading on the response with and without immovable supports and temperature dependent material properties. An important conclusion of the study is that the interaction between mechanical loads, temperature induced deformations, and degradation of the mechanical properties due to elevated temperatures, may seriously affect the structural integrity.

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Citation

Frostig, Y. and Thomsen, O.T. (2008) Non-linear thermal response of sandwich panels with a flexible core and temperature dependent mechanical properties Composites Part B: Engineering, 39, (1), pp. 165-184. (doi:10.1016/j.compositesb.2007.02.013).

More information

e-pub ahead of print date: 27 February 2007
Published date: January 2008
Keywords: foams, buckling, thermomechanical, analytic modeling
Organisations: Engineering Mats & Surface Engineerg Gp

Identifiers

Local EPrints ID: 339219
URI: http://eprints.soton.ac.uk/id/eprint/339219
ISSN: 1359-8368
PURE UUID: f84498e1-72be-4679-9165-066f9ce5b585

Catalogue record

Date deposited: 25 May 2012 08:35
Last modified: 18 Jul 2017 05:53

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Contributors

Author: Y. Frostig
Author: O.T. Thomsen

University divisions


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