Steel/CFRP joint behaviour with carbon nanotube modified epoxy adhesive at elevated temperatures

Asghar Habibnejad Korayem, Chenyang Li, Qianhui Zhang, Xiao Ling Zhao, Wenhui Duan

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Abstract

The behaviour of steel/CFRP double strap joints with carbon nanotube (CNT) modified epoxy under moderately elevated temperatures (23 to 70°C) is investigated. Experimental test results presented in this paper include bond strength, CFRP strain distribution and bond-slip relationship. Results show that, compared with neat epoxy, CNT-epoxy can provide a significant increase (about twofold) in bond strength at moderately elevated temperatures. The ultimate axial strain along CFRP laminates at joints with CNT-epoxy adhesive is greater than that with neat epoxy. The bond-slip curve shape transits from a trapezoidal to a triangular shape when the test temperature increases from ambient to moderately elevated temperatures. The peak shear stress and the fracture energy of joints bonded with CNT-epoxy adhesive are higher than those of joints with neat epoxy. It is demonstrated that incorporation of CNTs into the bond adhesive allows better exploitation of the potential of the CFRP system for strengthening steel structures at moderately elevated temperatures.

Original languageEnglish
Title of host publicationThe 7th International Conference on FRP Composites in Civil Engineering (CICE 2014)
Subtitle of host publicationVancouver, British Columbia, Canada, August 20-22, 2014 [proceedings]
EditorsRaafat El-Hacha
Place of PublicationCanada
PublisherInternational Institute for FRP in Construction
Pages1-6
Number of pages6
ISBN (Electronic)9781771363082
ISBN (Print)9781771363082
Publication statusPublished - 2014
EventInternational Conference on FRP Composites in Civil Engineering (CICE) 2014 - University of British Columbia, Vancouver, Canada
Duration: 20 Aug 201422 Aug 2014
Conference number: 7th
https://www.iifc.org/proceedings/CICE_2014/CICE2014.pdf

Publication series

NameProceedings of the 7th International Conference on FRP Composites in Civil Engineering, CICE 2014

Conference

ConferenceInternational Conference on FRP Composites in Civil Engineering (CICE) 2014
Abbreviated titleCICE 2014
CountryCanada
CityVancouver
Period20/08/1422/08/14
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