Carbon nanotube embedded adhesives for real-time monitoring of adhesion failure in high performance adhesively bonded joints

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dc.contributor.authorBregar, Tadej
dc.contributor.authorAn, Donglan
dc.contributor.authorGharavian, Somayeh
dc.contributor.authorBurda, Marek
dc.contributor.authorDurazo-Cardenas, Isidro
dc.contributor.authorThakur, Vijay Kumar
dc.contributor.authorAyre, David
dc.contributor.authorSłoma, Marcin
dc.contributor.authorHardiman, Mark
dc.contributor.authorMcCarthy, Conor
dc.contributor.authorNezhad, Hamed Yazdani
dc.date.accessioned2020-10-12T15:42:48Z
dc.date.available2020-10-12T15:42:48Z
dc.date.freetoread2020-10-12
dc.date.issued2020-10-08
dc.description.abstractCarbon 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 (0.18mm thickness), possessing higher CNT contact points than thick bonds (0.43mm thicknes), provide 100 times higher sensitivity to varying cyclic loadsen_UK
dc.identifier.citationBregar T, An D, Gharavian S, et al., (2020) Carbon nanotube embedded adhesives for real-time monitoring of adhesion failure in high performance adhesively bonded joints. Scientific Reports, Volume 10, 2020, Article number 16833en_UK
dc.identifier.issn2045-2322
dc.identifier.urihttps://doi.org/10.1038/s41598-020-74076-y
dc.identifier.urihttps://dspace.lib.cranfield.ac.uk/handle/1826/15877
dc.language.isoenen_UK
dc.publisherSpringer Natureen_UK
dc.rightsAttribution 4.0 International*
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/*
dc.subjectsensitivityen_UK
dc.subjectadhesion failureen_UK
dc.subjectin-situ strain measurementen_UK
dc.subjectsingle-lap bonded jointsen_UK
dc.subjectpiezo-resistivityen_UK
dc.subjectaerospaceen_UK
dc.subjectepoxy adhesiveen_UK
dc.subjectCNTen_UK
dc.titleCarbon nanotube embedded adhesives for real-time monitoring of adhesion failure in high performance adhesively bonded jointsen_UK
dc.typeArticleen_UK

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