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

Asghar Habibnejad Korayem, Chen Yang Li, Qian Hui Zhang, Xiao Ling Zhao, Wen Hui Duan

Research output: Chapter in book / Conference proceedingConference article published in proceeding or bookAcademic researchpeer-review

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 publicationProceedings of the 7th International Conference on FRP Composites in Civil Engineering, CICE 2014
EditorsRaafat El-Hacha
PublisherInternational Institute for FRP in Construction (IIFC)
ISBN (Electronic)9781771363082
Publication statusPublished - 2014
Externally publishedYes
Event7th International Conference on FRP Composites in Civil Engineering, CICE 2014 - Vancouver, Canada
Duration: 20 Aug 201422 Aug 2014

Publication series

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

Conference

Conference7th International Conference on FRP Composites in Civil Engineering, CICE 2014
Country/TerritoryCanada
CityVancouver
Period20/08/1422/08/14

ASJC Scopus subject areas

  • Polymers and Plastics
  • Civil and Structural Engineering

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