Behaviour of fibre composite sandwich structures under short and asymmetrical beam shear tests

Manalo, A. C. (2013) Behaviour of fibre composite sandwich structures under short and asymmetrical beam shear tests. Composite Structures, 99. pp. 339-349. ISSN 0263-8223

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Abstract

The behaviour of structural fibre composite sandwich beams made up of glass fibre composite skins and phenolic core material was investigated under three-point short beam and asymmetrical beam shear tests. The effect of the shear span-to-depth ratio (a/D) was examined on the strength and failure behaviour of the composite sandwich beams. The results showed that with increasing a/D ratio, the failure load of the sandwich beam is decreasing. On the contrary, the coupling effect of flexural stresses increases with increasing a/D ratio. Noticeably, the fibre composite sandwich beams tested under asymmetrical beam shear exhibited higher failure load compared to beams tested under short beam shear. Analysis showed that the shear stress in the core is more dominant than flexural stress when the a/D ratio is 1 for the sandwich beams under short beam test and 1 to 3 for the sandwich beams tested under asymmetrical beams shear test. The proposed prediction equation which accounts for the combined effect of shear and flexural stresses due to the changing a/D ratio showed that it can reasonably estimate the failure load of structural fibre composite sandwich beams. Comparison showed a good agreement with the experimental results.


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Item Type: Article (Commonwealth Reporting Category C)
Refereed: Yes
Item Status: Live Archive
Additional Information: Accepted version depoisted in accordance with the copyright policy of the publisher,
Faculty / Department / School: Historic - Faculty of Engineering and Surveying - Department of Agricultural, Civil and Environmental Engineering
Date Deposited: 03 May 2013 05:46
Last Modified: 11 Sep 2014 03:37
Uncontrolled Keywords: fibre composites; sandwich beams; phenolic core; shear; short beam; asymmetrical beam
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: E Expanding Knowledge > 97 Expanding Knowledge > 970109 Expanding Knowledge in Engineering
Identification Number or DOI: 10.1016/j.compstruct.2012.12.010
URI: http://eprints.usq.edu.au/id/eprint/22658

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