Flexural behaviour of laminated fibre composite sandwich beams

Manalo, A. C. and Aravinthan, T. and Karunasena, W. (2009) Flexural behaviour of laminated fibre composite sandwich beams. In: 2nd Asia-Pacific Conference on FRP in Structures (APFIS 2009), 9-11 Dec 2009, Seoul, Korea.

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A new generation composite sandwich made up of glass fibre reinforced polymer skins and lightweight but high strength core material has been developed in Australia. Experimental investigation was conducted to determine the behaviour of this composite sandwich with a view of using this material for structural beam. As these sandwiches are produced in limited thicknesses, the structural beam section could be attained by gluing a number of sandwiches in the flatwise (horizontal) or edgewise (vertical) positions. Characterisation of the behaviour of individual sandwiches as well as beams with 2, 3 and 4 composite sandwiches glued together was conducted. The results showed that the composite sandwiches in the edgewise position has a 9% lower effective modulus of elasticity in bending than in the flatwise position. However, it failed at a 20% higher load with a different failure mode. The specimens in the edgewise position failed with greater ductility due to progressive failure of the fibre composite skins while the specimens in the flatwise position failed in a brittle manner due to core shear failure followed by delamination between the skin and the core. These initial results are very encouraging. With further investigation, the development of structural beams from these fibre composite sandwiches could be realised.

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Item Type: Conference or Workshop Item (Commonwealth Reporting Category E) (Paper)
Refereed: Yes
Item Status: Live Archive
Additional Information: Permanent restricted access to published version due to publisher copyright policy.
Faculty / Department / School: Historic - Faculty of Engineering and Surveying - Department of Agricultural, Civil and Environmental Engineering
Date Deposited: 31 May 2010 06:19
Last Modified: 02 Apr 2015 05:01
Uncontrolled Keywords: composite sandwiche; laminated sandwich beams; bending; flatwise; edgewise
Fields of Research : 09 Engineering > 0905 Civil Engineering > 090506 Structural Engineering
09 Engineering > 0905 Civil Engineering > 090503 Construction Materials
09 Engineering > 0912 Materials Engineering > 091202 Composite and Hybrid Materials
Socio-Economic Objective: B Economic Development > 87 Construction > 8703 Construction Materials Performance and Processes > 870303 Polymeric Materials (e.g. Paints)
URI: http://eprints.usq.edu.au/id/eprint/6509

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