Flexural behavior of an FRP sandwich system with glass-fiber skins and a phenolic core at elevated in-service temperature

Manalo, Allan and Surendar, Swetha and van Erp, Gerard and Benmokrane, Brahim (2016) Flexural behavior of an FRP sandwich system with glass-fiber skins and a phenolic core at elevated in-service temperature. Composite Structures, 152. pp. 96-105. ISSN 0263-8223


This paper presents the effects of elevated in-service temperature on the flexural behavior of sandwich composites consisting of glass-fiber-reinforced-polymer (GFRP) skins and a phenolic core. The glass transition temperatures of the GFRP skin and phenolic core were obtained from dynamic mechanical analysis (DMA). Subsequently, the flexural behavior of the GFRP skin and the sandwich beams were assessed with a 3-point static bending test at temperatures ranging from room temperature up to 180oC. The results show that the variation trend of the GFRP skin’s stiffness from 3-point static bending test is in general agreement with the corresponding storage modulus results from the DMA. The GFRP skin, phenolic core, and sandwich beams retained more than 80% of their mechanical properties at 80oC. Moreover, the flexural behavior of the sandwich beams was governed by the GFRP skins up to 80oC, while the phenolic core played a major part on overall behavior beyond this temperature. The full-composite action between the skin and core was lost due to the disintegration of the phenolic core at high temperature.

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Item Type: Article (Commonwealth Reporting Category C)
Refereed: Yes
Item Status: Live Archive
Additional Information: Files associated with this item cannot be displayed due to copyright restrictions.
Faculty / Department / School: Current - Faculty of Health, Engineering and Sciences - School of Civil Engineering and Surveying
Date Deposited: 14 Sep 2016 01:24
Last Modified: 14 Sep 2016 01:24
Uncontrolled Keywords: Sandwich composites; elevated in-service temperature; GFRP skins; phenolic core; flexure
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.2016.05.028
URI: http://eprints.usq.edu.au/id/eprint/29715

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