PSI - Issue 64

Lingzhen Li et al. / Procedia Structural Integrity 64 (2024) 1318–1325 Author name / Structural Integrity Procedia 00 (2019) 000–000

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Conclusions This study proposes a Wine Glass model, offering an intuitive graphical and analytical solution to the bond capacity, with the following steps. (1) The adherent stress-strain curve plotted against stress-axis is regarded as the wine glass; (2) analogizing the debonding fracture energy divided by the adherent strip thickness to the volume of wine poured into the wine glass; (3) the wine level height corresponds to the adherent tensile stress at the bond capacity. This Wine Glass model has unveiled the mechanism governing bond capacity. Its robustness and accuracy have been validated on lap-shear tests comprising linear and nonlinear adherents (CFRP and Fe-SMA), as well as linear and nonlinear adhesives. In addition, this model enables researchers and engineers to evaluate the bond capacities of bonded joints in shear, even without computers. Acknowledgements The first author is sponsored by the Innovation and Technology Fund (ITF) Research Talent Hub of Hong Kong and appreciates the China Scholarship Council (CSC) for the financial support to his PhD work (2019-2023). References Cladera, A., Weber, B., Leinenbach, C., Czaderski, C., Shahverdi, M., Motavalli, M., 2014. Iron-based shape memory alloys for civil engineering structures: An overview. Construction and Building Materials 63, 281–293. https://doi.org/10.1016/j.conbuildmat.2014.04.032 Cruz, J.R., Seręga, S., Sena - Cruz, J., Pereira, E., Kwiecień, A., Zając, B., 2020. Flexural behaviour of NSM CFRP laminate strip systems in concrete using stiff and flexible adhesives. Composites Part B: Engineering 195, 108042. https://doi.org/10.1016/j.compositesb.2020.108042 Fernando, D., Yu, T., Teng, J.G., 2014. Behavior of CFRP Laminates Bonded to a Steel Substrate Using a Ductile Adhesive. J. Compos. Constr. 18, 04013040. https://doi.org/10.1061/(ASCE)CC.1943-5614.0000439 Gu, X.-L., Chen, Z.-Y., Yu, Q.-Q., Ghafoori, E., 2021. Stress recovery behavior of an Fe-Mn-Si shape memory alloy. Engineering Structures 243, 112710. https://doi.org/10.1016/j.engstruct.2021.112710 Li, L., Chatzi, E., Ghafoori, E., 2023a. Debonding model for nonlinear Fe-SMA strips bonded with nonlinear adhesives. Engineering Fracture Mechanics 282, 109201. https://doi.org/10.1016/j.engfracmech.2023.109201 Li, L., Chen, T., Gu, X., Ghafoori, E., 2020. Heat Activated SMA-CFRP Composites for Fatigue Strengthening of Cracked Steel Plates. J. Compos. Constr. 24, 04020060. https://doi.org/10.1061/(ASCE)CC.1943-5614.0001072 Li, L., Wang, W., Chatzi, E., Ghafoori, E., 2023b. Experimental investigation on debonding behavior of Fe-SMA-to-steel joints. Construction and Building Materials 364, 129857. https://doi.org/10.1016/j.conbuildmat.2022.129857 Wang, W., Hosseini, A., Ghafoori, E., 2021. Experimental study on Fe-SMA-to-steel adhesively bonded interfaces using DIC. Engineering Fracture Mechanics 244, 107553. https://doi.org/10.1016/j.engfracmech.2021.107553 Xia, S.H., Teng, J., 2005. Behaviour of FRP-to-steel bonded joints, in: Proceedings of the International Symposium on Bond Behaviour of FRP in Structures, BBFS 2005. International Institute for FRP in Construction (IIFC), pp. 411–418. Zheng, B., Dawood, M., 2017. Fatigue Strengthening of Metallic Structures with a Thermally Activated Shape Memory Alloy Fiber-Reinforced Polymer Patch. J. Compos. Constr. 21, 04016113. https://doi.org/10.1061/(ASCE)CC.1943-5614.0000776