Durability of bonded FRP-to-steel jointsEffects of moisture, de-icing salt solution, temperature and FRP type
Journal article, 2017

This paper investigates the effects of environmental ageing on the mechanical response of adhesively bonded double-lap shear joints made of steel and CFRP or GFRP adherents. One hundred and ninety-two specimens, 84 joints and 108 material coupons, were aged for up to three years in various environments including (i) immersion in distilled water at 20 °C and 45 °C, (ii) immersion in de-icing salt solution at 20 °C and 45 °C and (iii) exposure to 95% relative humidity at 45 °C. In general, immersion at 45 °C resulted in noticeably greater strength reductions at both material and joint level. While the strength and stiffness of the joints made of GFRP material underwent significant reductions, the CFRP/steel joints were affected to a considerably smaller degree. FE simulations showed the impact of the permeability of FRP adherents and moisture distribution at the FRP/adhesive interface on the integrity and strength of the joints. The joint-level results are compared with the most relevant durability data in the literature.

FRP-steel bonded joints

Mechanical properties

Environmental degradation

Polymer-matrix composites (PMCs)


Mohsen Heshmati

Chalmers, Civil and Environmental Engineering, Structural Engineering

Reza Haghani Dogaheh

Chalmers, Civil and Environmental Engineering, Structural Engineering

Mohammad Al-Emrani

Chalmers, Civil and Environmental Engineering, Structural Engineering

Composites Part B: Engineering

1359-8368 (ISSN)

Vol. 119 153-167

Driving Forces

Sustainable development

Areas of Advance


Building Futures (2010-2018)

Materials Science

Subject Categories

Transport Systems and Logistics

Infrastructure Engineering

Other Environmental Engineering

Other Materials Engineering

Composite Science and Engineering



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