Details
| Original language | English |
|---|---|
| Article number | 138937 |
| Journal | Construction and Building Materials |
| Volume | 453 |
| Early online date | 5 Nov 2024 |
| Publication status | E-pub ahead of print - 5 Nov 2024 |
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
ASJC Scopus subject areas
- Engineering(all)
- Civil and Structural Engineering
- Engineering(all)
- Building and Construction
- Materials Science(all)
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In: Construction and Building Materials, Vol. 453, 138937, 29.11.2024.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Effect of elevated temperature on the bond behaviour of adhesive shear joints between glass substrate and iron-based shape memory alloy strip
AU - Deng, Zhikang
AU - Silvestru, Vlad Alexandru
AU - Li, Lingzhen
AU - Ghafoori, Elyas
AU - Taras, Andreas
N1 - Publisher Copyright: © 2024 The Authors
PY - 2024/11/5
Y1 - 2024/11/5
N2 - 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.
AB - 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.
KW - Bond behaviour
KW - Debonding
KW - Elevated temperature
KW - Epoxy adhesive
KW - Glass
KW - Iron-based shape memory alloy (Fe-SMA)
KW - Lap-shear joint
UR - http://www.scopus.com/inward/record.url?scp=85208112207&partnerID=8YFLogxK
U2 - 10.1016/j.conbuildmat.2024.138937
DO - 10.1016/j.conbuildmat.2024.138937
M3 - Article
AN - SCOPUS:85208112207
VL - 453
JO - Construction and Building Materials
JF - Construction and Building Materials
SN - 0950-0618
M1 - 138937
ER -