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Effects of Plate Slenderness on the Ultimate Strength Behaviour of Foam Supported Steel Plate Elements

Pokharel, Narayan D. & Mahendran, Mahen (2005) Effects of Plate Slenderness on the Ultimate Strength Behaviour of Foam Supported Steel Plate Elements. Structural Engineering and Mechanics, 21(4), pp. 407-422.

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Abstract

Plate elements in fully profiled sandwich panels are generally subjected to local buckling failure modes and this behaviour is treated in design by using the conventional effective width method for plates with a width to thickness (b/t) ratio less than 100. If the plate elements are very slender (b/t>1000), the panel failure is governed by wrinkling instead of local buckling and the strength is determined by the flexural wrinkling formula. The plate elements in fully profiled sandwich panels do not fail by wrinkling as their b/t ratio is generally in the range of 100 to 600. For this plate slenderness region, it was found that the current effective width formula overestimates the strength of the fully profiled sandwich panels whereas the wrinkling formula underestimates it. Hence a new effective width design equation has been developed for practical plate slenderness values. However, no guidelines exist to identify the plate slenderness (b/t) limits defining the local buckling, wrinkling and the intermediate regions so that appropriate design rules can be used based on plate slenderness ratios. A research study was therefore conducted using experimental and numerical studies to investigate the effect of plate slenderness ratio on the ultimate strength behaviour of foam supported steel plate elements. This paper presents the details of the study and the results.

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1 citations in Web of Science®

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ID Code: 7626
Item Type: Journal Article
Additional Information: Access to the author-version is currently restricted pending permission from the publisher. For more information, please refer to the journal’s website (see link) or contact the author. Author contact details: m.mahendran@qut.edu.au
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Keywords: Profiled sandwich panels, local buckling, flexural wrinkling, plate slenderness limit, intermediate region, effective width
ISSN: 1225-4568
Subjects: Australian and New Zealand Standard Research Classification > ENGINEERING (090000) > CIVIL ENGINEERING (090500) > Structural Engineering (090506)
Divisions: Past > QUT Faculties & Divisions > Faculty of Built Environment and Engineering
Copyright Owner: Copyright 2005 Techno-Press
Deposited On: 14 May 2007
Last Modified: 29 Feb 2012 23:12

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