Evaluation of the strength and stiffness of glue-laminated fibre composite sandwich panels for structural beam application

Manalo, Allan C. and Aravinthan, Thiru and Karunasena, Warna (2010) Evaluation of the strength and stiffness of glue-laminated fibre composite sandwich panels for structural beam application. In: 6th Australasian Congress on Applied Mechanics (ACAM 6), 12-15 Dec 2010, Perth, Western Australia.

Abstract

An evaluation of the behaviour of innovative structural beams made by gluing together a number of composite sandwich panels in the flatwise and in the edgewise positions is presented in this paper. The building block of these innovative beams is a composite sandwich structure made up of glass fibre reinforced polymer skins and modified phenolic foam core material. Four-point static bending and asymmetrical beam shear tests were conducted to evaluate the strength and stiffness of these structural beams. The effect of the number and orientation of sandwich laminations on the behaviour of the glue-laminated sandwich beams is investigated. Results showed that beams tested in the edgewise position failed with higher strength but have slightly lower bending stiffness than beams in the flatwise position. More importantly, the specimens in the edgewise position failed with greater ductility due to the progressive failure of the vertical fibre composite skins while the specimens in the flatwise position failed in a brittle manner due to compressive failure of the fibre composite skins. Under shear loading, the behaviour of the sandwich beams in the flatwise position is governed by the shear strength of the core while in the edgewise position by the shear strength of the fibre composite skin. The results of the theoretical evaluation of the flexural and shear strengths of the sandwich beams were in good agreement with the experimental results. Preliminary examination showed the high potential of glue-laminated sandwich beams for replacement of deteriorating timber structures.


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Item Type: Conference or Workshop Item (Commonwealth Reporting Category E) (Paper)
Refereed: Yes
Item Status: Live Archive
Additional Information: Copyright Engineers Australia 2010. Permanent restricted access to published version due to publisher copyright policy
Depositing User: Mr Allan Manalo
Faculty / Department / School: Historic - Faculty of Engineering and Surveying - Department of Agricultural, Civil and Environmental Engineering
Date Deposited: 07 Jan 2011 01:06
Last Modified: 28 Nov 2014 06:39
Uncontrolled Keywords: fibre composites; flexure; glulam beams; phenolic core; sandwich structure; shear
Fields of Research (FOR2008): 09 Engineering > 0905 Civil Engineering > 090506 Structural Engineering
09 Engineering > 0905 Civil Engineering > 090502 Construction Engineering
09 Engineering > 0912 Materials Engineering > 091202 Composite and Hybrid Materials
Socio-Economic Objective (SEO2008): B Economic Development > 87 Construction > 8702 Construction Design > 870201 Civil Construction Design
URI: http://eprints.usq.edu.au/id/eprint/9306

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