Flexural and shear behaviour of layered sandwich beams

Ferdous, Wahid and Manalo, Allan and Aravinthan, Thiru and Fam, Amir (2018) Flexural and shear behaviour of layered sandwich beams. Construction and Building Materials, 173. pp. 429-442. ISSN 0950-0618

Abstract

A new type of composite beam, referred to as Layered Sandwich Beam (LSB) is introduced in this study. The sandwich system consists of Glass Fiber Reinforced Polymer (GFRP) skins and Phenolic cores, and several layers of sandwich panels are bonded together with epoxy polymer matrix for manufacturing beams. To explore the suitability of this novel concept for structural applications, the flexural and shear behaviour of LSB have been investigated. Eight LSB, with four having layers horizontally oriented and the other four vertically oriented, have been tested under four-point bending and asymmetrical beam shear. A three-dimensional finite element model was developed using Strand7 to further understand the fundamental behaviour of the LSB. The results showed that the LSB has an increased sectional stability by preventing wrinkling and buckling of the composite skins and indentation failure. This improved the bending and shear strengths of the vertical LSB by 25% and 100%, respectively, compared with single sandwich beams in same orientation. While horizontal LSB provided a higher bending stiffness, the vertical beams exhibited higher shear strength due to the orientation of the skins. The finite element model can reliably predict the fundamental behaviour of the LSB in different orientations and loading configurations, within −10% to +14%.


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Item Type: Article (Commonwealth Reporting Category C)
Refereed: Yes
Item Status: Live Archive
Additional Information: Restricted access to published version in accordance with the copyright policy of the publisher.
Faculty / Department / School: Current - Faculty of Health, Engineering and Sciences - School of Civil Engineering and Surveying
Date Deposited: 18 Jul 2018 04:10
Last Modified: 21 Sep 2018 05:17
Uncontrolled Keywords: composite beam, orientation of sandwich panel, shear span-to-depth ratio, flexure, shear, finite element analysis
Fields of Research : 09 Engineering > 0905 Civil Engineering > 090506 Structural Engineering
09 Engineering > 0912 Materials Engineering > 091202 Composite and Hybrid Materials
09 Engineering > 0912 Materials Engineering > 091209 Polymers and Plastics
Socio-Economic Objective: E Expanding Knowledge > 97 Expanding Knowledge > 970109 Expanding Knowledge in Engineering
Identification Number or DOI: 10.1016/j.conbuildmat.2018.04.068
URI: http://eprints.usq.edu.au/id/eprint/34476

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