Carbon nanotube embedded adhesives for real-time monitoring of adhesion failure in high performance adhesively bonded joints
| Autor: | Tadej Bregar, Isidro Sergio Durazo-Cardenas, Vijay Kumar Thakur, Somayeh Gharavian, Marek Burda, Marcin Słoma, Conor T. McCarthy, David Ayre, Hamed Yazdani Nezhad, Donglan An, Mark Hardiman |
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| Přispěvatelé: | SFI, Cametics Ltd, EU |
| Rok vydání: | 2020 |
| Předmět: |
TP
Materials science TL CNT mechanical loads Carbon nanotubes lcsh:Medicine Carbon nanotubes and fullerenes Mechanical properties 02 engineering and technology Carbon nanotube 010402 general chemistry single-lap bonded joints Characterization and analytical techniques 01 natural sciences Article law.invention adhesion failure law Electrical resistivity and conductivity Ultimate tensile strength Ultimate failure Composite material lcsh:Science Author Correction QC Composites chemistry.chemical_classification Multidisciplinary lcsh:R Adhesion Polymer piezo-resistivity epoxy adhesive 021001 nanoscience & nanotechnology sensitivity aerospace Mechanical engineering 0104 chemical sciences Aerospace engineering chemistry lcsh:Q TJ Adhesive 0210 nano-technology Dispersion (chemistry) in-situ strain measurement |
| Zdroj: | Scientific Reports Scientific Reports, Vol 10, Iss 1, Pp 1-20 (2020) |
| ISSN: | 2045-2322 |
| Popis: | peer-reviewed An Author Correction to this article was published on the 4/02/2021 and updated in ULIR on 09/02/2021, see file version 2. Carbon nanotubes (CNTs) embedded polymers are of increasing interest to scientific and industrial communities for multi‑functional applications. in this article, cnts have been introduced to high‑ strength epoxy adhesive for enabling in‑situ strain sensing in adhesively bonded aluminium‑to‑ aluminium single‑lap joints to accurately indicate the onset and propagation of adhesion failure to the evolution of piezo-resistivity in varying mechanical loads. The CNT modified adhesive in bonded joints and the CNT modified adhesive alone have been tested under monothonic and cyclic tensile loads up to ultimate failure. the changes in the piezo‑resistivity induced by the cnts have been monitored in situ with respect to loading. A novel interpretation method has been developed for progressive, instantaneous adhesion failure estimation under cyclic tensile stresses from a resistivity baseline. the method indicates that the in‑situ resistivity changes and the rate of the changes with strain, i.e. sensitivity, strongly correlate with the adhesion failure progression, irrespective of the cnt dispersion quality. Moreover, the effect of bond thickness on the evolution of piezo-resistivity and adhesion failure have been studied. It was observed that relatively thin adhesive bonds (0.18 mm thickness), possessing higher CNT contact points than thick bonds (0.43 mm thickness), provide 100 times higher sensitivity to varying cyclic loads. |
| Databáze: | OpenAIRE |
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