Temperature effect on the bond behavior of basalt FRP-steel single-lap joints under dynamic tensile loading

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

Research output: Contribution to conferencePaper

Abstract

In the present work, basalt FRP/steel single-lap joints were tested at various temperatures under dynamic tensile loading. Basalt FRP was fabricated by means of vacuum-assisted resin transfer molding (VARTM) processing, and bonded to steel plates with an overlap length of 25 mm using two-component epoxy resin (Sikadur® 330). Dynamic tensile tests of the BFRP-steel specimens at varying temperatures ranging from -25 to 100 °C were conducted using a servo-hydraulic high-rate testing machine at a loading speed of 0.625 m/s. The deformation and failure behavior of samples in the overlap region were captured using a Phantom v7.3 high speed digital camera at a sampling rate of 20000 fps, and subsequently analyzed using digital image correlation (DIC) method. Experimental results include average bond strength, toughness, bond-slip curves and FRP strain distribution were presented. The average bond strength and toughness increased in the range of -25 to 50 °C, while decreased significantly from 50 to 100 °C as the temperature exceeded the glass transition temperature Tg. The observed typical failure mode in most specimens at low temperature was debonding at adhesive-steel interface, whereas samples ruptured at the adhesive-FRP interface at elevated temperature with lower bearing capacity.

Conference

ConferenceJoint Conference of the 12th International Symposium on Fiber Reinforced Polymers for Reinforced Concrete Structures, FRPRCS 2015 and the 5th Asia-Pacific Conference on Fiber Reinforced Polymers in Structures, APFIS 2015
CountryChina
CityNanjing
Period12/14/1512/16/15

Keywords

  • BFRP
  • Dynamic testing
  • Failure mode
  • Single-lap joints
  • Temperature

ASJC Scopus subject areas

  • Civil and Structural Engineering
  • Materials Science(all)

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