Effect of carbon nanotube modified epoxy adhesive on CFRP-to-steel interface

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

Research output: Journal article publicationJournal articleAcademic researchpeer-review

57 Citations (Scopus)

Abstract

The effects of carbon nanotube (CNT) modified epoxy adhesive on CFRP-to-steel interfaces were investigated using double strap joints. The bond behaviours studied were failure modes, bond interface at microlevel, bond strength, effective bond length, CFRP strain distribution and bond-slip relationships. For the first time, a novel type of failure in the CFRP-steel joint was discovered, attributable to weak bonding between woven mesh and CFRP fibres. This failure mode prevented exploitation of the full potential of the carbon fibres and the CNT modified epoxy adhesive. Joints bonded with CNT-epoxy adhesive had an effective bond length of about 60 mm, whereas that of joints bonded with pure epoxy was about 70 mm. The CNT-epoxy adhesive can transfer more load from the host structure to the bonded CFRP laminates, consequently modifying bond behaviour. It is therefore expected that CNT-epoxy nanocomposites will assist in the strengthening and rehabilitation of steel infrastructures using CFRP laminates.

Original languageEnglish
Pages (from-to)95-104
Number of pages10
JournalComposites Part B: Engineering
Volume79
DOIs
Publication statusPublished - 8 May 2015
Externally publishedYes

Keywords

  • A. Carbon fibre
  • A. Particle-reinforcement
  • B. Interface/interphase
  • D. Mechanical testing

ASJC Scopus subject areas

  • Ceramics and Composites
  • Mechanics of Materials
  • Mechanical Engineering
  • Industrial and Manufacturing Engineering

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