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

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 environme...

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Published in:Composites. Part B, Engineering Vol. 119; p. 153
Main Authors: Heshmati, Mohsen, Haghani Dogaheh, Reza, Al-Emrani, Mohammad
Format: Journal Article
Language:English
Published: 15.06.2017
Subjects:
Environmental degradation
FRP-steel bonded joints
Mechanical properties
Polymer-matrix composites (PMCs)
ISSN:1359-8368
Online Access:Get full text
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Abstract 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.
AbstractList 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.
Author Heshmati, Mohsen
Al-Emrani, Mohammad
Haghani Dogaheh, Reza
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Snippet 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...
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StartPage 153
SubjectTerms Environmental degradation
FRP-steel bonded joints
Mechanical properties
Polymer-matrix composites (PMCs)
Title Durability of bonded FRP-to-steel jointsEffects of moisture, de-icing salt solution, temperature and FRP type
URI https://research.chalmers.se/publication/248956
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