Effect of elevated temperature on the bond behaviour of adhesive shear joints between glass substrate and iron-based shape memory alloy strip

authored by: Zhikang Deng, Vlad Alexandru Silvestru, Lingzhen Li, Elyas Ghafoori, Andreas Taras
Abstract: Glass has been increasingly used as structural elements, such as glass beams or fins. Previous feasibility studies have shown increased initial and post-fracture load-bearing capacity of laminated glass beams post-tensioned with adhesively bonded iron-based shape memory alloy (Fe-SMA) strips. However, the potential elevated service temperatures were not considered, which significantly degraded the material properties of the adhesive. This study experimentally investigated the mechanical behaviour of Fe-SMA-to-glass lap-shear joints with an epoxy adhesive at different temperatures of 23 °C, 50 °C, and 80 °C, representing room temperature and typical elevated service temperatures. The results showed that, compared with the one at room temperature, the load-carrying capacity remained nearly unchanged at 50 °C and decreased by approximately 20 % at 80 °C. On the contrary, the effective bond length increased from approximately 116 mm to 250–300 mm. The failure modes, the tensile strain of the iron-based shape memory alloy, the bond-slip behaviour, and the fracture energy of the joints were also evaluated. The current study fills a significant research gap in the engineering application of strengthening glass structures by bonded pre-stressed Fe-SMA strips. Moreover, the results may also significantly contribute to the future application of the selected adhesive at elevated temperatures.
Organisation(s): Institute of Steel Construction
Faculty of Civil Engineering and Geodetic Science
External Organisation(s): ETH Zurich
Swiss Federal Laboratories for Material Science and Technology (EMPA)
Hong Kong Polytechnic University
Type: Article
Journal: Construction and Building Materials
Volume: 453
ISSN: 0950-0618
Publication date: 29.11.2024
Publication status: Published
Peer reviewed: Yes
ASJC Scopus subject areas: Civil and Structural Engineering, Building and Construction, General Materials Science
Electronic version(s): https://doi.org/10.1016/j.conbuildmat.2024.138937 (Access: Open)

BibTeX

@article{f76ff75c4aac4406a2e684e5f861e74b,
title = "Effect of elevated temperature on the bond behaviour of adhesive shear joints between glass substrate and iron-based shape memory alloy strip",
abstract = "Glass has been increasingly used as structural elements, such as glass beams or fins. Previous feasibility studies have shown increased initial and post-fracture load-bearing capacity of laminated glass beams post-tensioned with adhesively bonded iron-based shape memory alloy (Fe-SMA) strips. However, the potential elevated service temperatures were not considered, which significantly degraded the material properties of the adhesive. This study experimentally investigated the mechanical behaviour of Fe-SMA-to-glass lap-shear joints with an epoxy adhesive at different temperatures of 23 °C, 50 °C, and 80 °C, representing room temperature and typical elevated service temperatures. The results showed that, compared with the one at room temperature, the load-carrying capacity remained nearly unchanged at 50 °C and decreased by approximately 20 % at 80 °C. On the contrary, the effective bond length increased from approximately 116 mm to 250–300 mm. The failure modes, the tensile strain of the iron-based shape memory alloy, the bond-slip behaviour, and the fracture energy of the joints were also evaluated. The current study fills a significant research gap in the engineering application of strengthening glass structures by bonded pre-stressed Fe-SMA strips. Moreover, the results may also significantly contribute to the future application of the selected adhesive at elevated temperatures.",
keywords = "Bond behaviour, Debonding, Elevated temperature, Epoxy adhesive, Glass, Iron-based shape memory alloy (Fe-SMA), Lap-shear joint",
author = "Zhikang Deng and Silvestru, {Vlad Alexandru} and Lingzhen Li and Elyas Ghafoori and Andreas Taras",
note = "Publisher Copyright: {\textcopyright} 2024 The Authors",
year = "2024",
month = nov,
day = "29",
doi = "10.1016/j.conbuildmat.2024.138937",
language = "English",
volume = "453",
journal = "Construction and Building Materials",
issn = "0950-0618",
publisher = "Elsevier Ltd.",
}