Local buckling strength of steel foam sandwich panels

Szyniszewski, Stefan, Schafer, BW, Smith, BH, Arwade, SR and Hajjar, JF (2012) Local buckling strength of steel foam sandwich panels Thin-Walled Structures, 59. pp. 11-19.

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Abstract

The objective of this paper is to provide and verify a new design method for the in-plane compressive strength of steel sandwich panels comprised of steel face sheets and foamed steel cores. Foamed steel, literally steel with internal voids, provides enhanced bending rigidity, exceptional energy dissipation, and the potential to mitigate local instability. In this work, Winters effective width expression is generalized to the case of steel foam sandwich panels. The generalization requires modification of the elastic buckling expressions to account for panel non-composite bending rigidity and shear deformations. In addition, an equivalent yield stress is introduced to provide a single parameter description of the yielding behavior of the steel face sheets and steel foam core. The provided analytical expressions are verified with finite element simulations employing three-dimensional continuum elements and calibrated constitutive models specific to metallic foams. The developed closed-form design expressions are employed to conduct parametric studies of steel foam sandwich panels, which (a) demonstrate the significant strength improvements possible when compared with solid steel, and (b) provide insights on the optimal balance between steel face sheet thickness and density of the foamed steel core. This work is part of a larger effort to help develop steel foam as a material with relevance to civil engineering applications. © 2012 Elsevier Ltd. All rights reserved.

Item Type:	Article
Divisions :	Faculty of Engineering and Physical Sciences
Authors :	Name Email ORCID Szyniszewski, Stefan s.szyniszewski@surrey.ac.uk Schafer, BW Smith, BH Arwade, SR Hajjar, JF
Date :	October 2012
DOI :	10.1016/j.tws.2012.04.014
Additional Information :	NOTICE: this is the author’s version of a work that was accepted for publication in Thin-Walled Structures. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published in Thin-Walled Structures, 59,October 2012, DOI 10.1016/j.tws.2012.04.014.
Depositing User :	Symplectic Elements
Date Deposited :	25 Mar 2014 09:06
Last Modified :	16 Jan 2019 16:50
URI:	http://epubs.surrey.ac.uk/id/eprint/805138

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