Temperature effect on the dynamic bond behavior of CFRP/steel single-lap shear joints

Mingxia Yao, Deju Zhu, Yiming Yao, Huaian Zhang, Barzin Mobasher

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

In this work, CFRP plates were made using vacuum assisted resin transfer molding (VARTM) technique. CFRP/Steel single-lap shear joints were manufactured by bonding steel and CFRP together with epoxy resin. Specimens were tested under dynamic tensile loading (0.625 m/s) on a servo-hydraulic high rate testing system under four temperatures (-25, 0, 50, 100 C). The experimental results showed that the mechanical properties of joints were sensitive to temperature. In a certain range, both the bond strength and interfacial fracture energy of specimens increased from -25 to 50 C. When the temperature exceeded the glass transition temperature of the adhesive, bond strength and interfacial fracture energy decreased significantly. The failure modes of specimens were different at varying temperatures. At the low temperature (-25 C and 0 C), the failure mode of joints were adhesive/steel interface debonding failure. At the temperature of 50 C, the failure mode turned to the mixed failure. When the temperature reached 100 C, the failure mode changed to adhesive/CFRP interface debonding failure. Moreover, the strain field distribution of FRP in overlapping area at different temperatures was analyzed using a digital image correlation (DIC) method. The results showed that the strains of FRP at the edge of overlapping area were larger than those in the center, and final failure was initiated at the edge of the specimen.

Original languageEnglish (US)
Title of host publicationProceedings of the 8th International Conference on Fibre-Reinforced Polymer (FRP) Composites in Civil Engineering, CICE 2016
EditorsJ.G. Dai, J.G. Teng
PublisherDepartment of Civil and Environmental Engineering and Research Institute for Sustainable Urban Development, The Hong Kong Polytechnic University
Pages1388-1394
Number of pages7
ISBN (Electronic)9789881448026
StatePublished - Jan 1 2016
Event8th International Conference on Fibre-Reinforced Polymer (FRP) Composites in Civil Engineering, CICE 2016 - Hong Kong, China
Duration: Dec 14 2016Dec 16 2016

Other

Other8th International Conference on Fibre-Reinforced Polymer (FRP) Composites in Civil Engineering, CICE 2016
CountryChina
CityHong Kong
Period12/14/1612/16/16

Keywords

  • Bond strength
  • Failure mode
  • Single lap shear joints
  • Temperature effect

ASJC Scopus subject areas

  • Civil and Structural Engineering
  • Polymers and Plastics

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