Experimental evaluation of bonding between CFRP laminates and different structural materials
- Citation:
- Experimental evaluation of bonding between CFRP laminates and different structural materials, Biscaia, Hugo, Chastre Carlos, Borba Isabel, Silva Cinderela, and Cruz David , Journal of Composites for Construction, Volume 20, Number 3, p.04015070, (2016) copy at https://docentes.fct.unl.pt/cmcr/publications/experimental-evaluation-bonding-between-cfrp-laminates-and-different-structural-ma
Abstract:
This study presents an analysis of Carbon Fiber Reinforced Polymers (CFRP)-to-parent material interfaces based on 40 single-lap shear tests intended to highlight the strength of the interfaces under fracture mode II. Three different substrates are analyzed: timber;concrete and steel, using the same CFRP laminates and adhesive agent. The Externally Bonded Reinforcement (EBR) technique was used throughout the study. The results show that the CFRP-to-timber interfaces had the highest strength but also showed that these interfaces need a longer bonded length in order to reach maximum strength, i.e., CFRP-to-timber interfaces had the longest effective bond length. The local non-linear bond-slip curve of CFRP-to-concrete can be approximated to exponential curves, whereas the CFRP-to-timber or steel interfaces showed tri-linear and bi-linear bond-slip relations, respectively. Also, the CFRP-to-timber interfaces revealed the highest fracture energy.
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