Damage monitoring of adhesively bonded composite-metal hybrid joints using carbon nanotube-based sensing layer

Improving mechanical properties and decreasing costs have significantly increased the use of fiber composites in automotive, aerospace, and civil engineering applications. Structural composites are bonded to traditional metallic materials in a variety of applications, and mechanical fasteners often...

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Autores principales:	Sagar M. Doshi, Tyler B. Lyness, Erik T. Thostenson
Formato:	article
Lenguaje:	EN
Publicado:	Taylor & Francis Group 2020
Materias:	carbon nanomaterials adhesive joints nanocomposites piezoresistivity damage monitoring sensors structural health monitoring Materials of engineering and construction. Mechanics of materials TA401-492 Polymers and polymer manufacture TP1080-1185
Acceso en línea:	https://doaj.org/article/b8217aa86b64410085349057c230833a
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spelling	oai:doaj.org-article:b8217aa86b64410085349057c230833a2021-12-02T08:33:52ZDamage monitoring of adhesively bonded composite-metal hybrid joints using carbon nanotube-based sensing layer2055-033210.1080/20550324.2019.1699229https://doaj.org/article/b8217aa86b64410085349057c230833a2020-01-01T00:00:00Zhttp://dx.doi.org/10.1080/20550324.2019.1699229https://doaj.org/toc/2055-0332Improving mechanical properties and decreasing costs have significantly increased the use of fiber composites in automotive, aerospace, and civil engineering applications. Structural composites are bonded to traditional metallic materials in a variety of applications, and mechanical fasteners often cannot be used due to the low bearing strength of composites. With the increasing use of adhesives in load-bearing structures, novel techniques are required for monitoring the structural integrity of adhesive joints. Previously, carbon nanotubes (CNTs) have been added to adhesives and resins to create in-situ sensors, but the increased viscosity and potential for galvanic corrosion remains a challenge. In this research, a piezoresistive carbon nanotube-based sensing layer is embedded in a composite/steel adhesive joint for damage sensing. The use of a thin sensing layer with low-fiber volume fraction enables the use of existing adhesives without causing any major changes in the physical properties of the adhesives or the curing cycle and reduces the chances of galvanic corrosion. Different approaches of using an adhesive layer and a nonconductive fabric are investigated for insulation of the sensing layer. The nonconductive fabric approach for insulating the specimen yields better mechanical properties as the there are no weak interfaces in the adhesive bondline. Additionally, it is more convenient for scaling up for field applications as the adhesive is cured in one stage. The sensing layer can not only be used to detect incipient damage in the joint, but also identify different modes of failure.Sagar M. DoshiTyler B. LynessErik T. ThostensonTaylor & Francis Grouparticlecarbon nanomaterialsadhesive jointsnanocompositespiezoresistivitydamage monitoringsensorsstructural health monitoringMaterials of engineering and construction. Mechanics of materialsTA401-492Polymers and polymer manufactureTP1080-1185ENNanocomposites, Vol 6, Iss 1, Pp 12-21 (2020)
institution	DOAJ
collection	DOAJ
language	EN
topic	carbon nanomaterials adhesive joints nanocomposites piezoresistivity damage monitoring sensors structural health monitoring Materials of engineering and construction. Mechanics of materials TA401-492 Polymers and polymer manufacture TP1080-1185
spellingShingle	carbon nanomaterials adhesive joints nanocomposites piezoresistivity damage monitoring sensors structural health monitoring Materials of engineering and construction. Mechanics of materials TA401-492 Polymers and polymer manufacture TP1080-1185 Sagar M. Doshi Tyler B. Lyness Erik T. Thostenson Damage monitoring of adhesively bonded composite-metal hybrid joints using carbon nanotube-based sensing layer
description	Improving mechanical properties and decreasing costs have significantly increased the use of fiber composites in automotive, aerospace, and civil engineering applications. Structural composites are bonded to traditional metallic materials in a variety of applications, and mechanical fasteners often cannot be used due to the low bearing strength of composites. With the increasing use of adhesives in load-bearing structures, novel techniques are required for monitoring the structural integrity of adhesive joints. Previously, carbon nanotubes (CNTs) have been added to adhesives and resins to create in-situ sensors, but the increased viscosity and potential for galvanic corrosion remains a challenge. In this research, a piezoresistive carbon nanotube-based sensing layer is embedded in a composite/steel adhesive joint for damage sensing. The use of a thin sensing layer with low-fiber volume fraction enables the use of existing adhesives without causing any major changes in the physical properties of the adhesives or the curing cycle and reduces the chances of galvanic corrosion. Different approaches of using an adhesive layer and a nonconductive fabric are investigated for insulation of the sensing layer. The nonconductive fabric approach for insulating the specimen yields better mechanical properties as the there are no weak interfaces in the adhesive bondline. Additionally, it is more convenient for scaling up for field applications as the adhesive is cured in one stage. The sensing layer can not only be used to detect incipient damage in the joint, but also identify different modes of failure.
format	article
author	Sagar M. Doshi Tyler B. Lyness Erik T. Thostenson
author_facet	Sagar M. Doshi Tyler B. Lyness Erik T. Thostenson
author_sort	Sagar M. Doshi
title	Damage monitoring of adhesively bonded composite-metal hybrid joints using carbon nanotube-based sensing layer
title_short	Damage monitoring of adhesively bonded composite-metal hybrid joints using carbon nanotube-based sensing layer
title_full	Damage monitoring of adhesively bonded composite-metal hybrid joints using carbon nanotube-based sensing layer
title_fullStr	Damage monitoring of adhesively bonded composite-metal hybrid joints using carbon nanotube-based sensing layer
title_full_unstemmed	Damage monitoring of adhesively bonded composite-metal hybrid joints using carbon nanotube-based sensing layer
title_sort	damage monitoring of adhesively bonded composite-metal hybrid joints using carbon nanotube-based sensing layer
publisher	Taylor & Francis Group
publishDate	2020
url	https://doaj.org/article/b8217aa86b64410085349057c230833a
work_keys_str_mv	AT sagarmdoshi damagemonitoringofadhesivelybondedcompositemetalhybridjointsusingcarbonnanotubebasedsensinglayer AT tylerblyness damagemonitoringofadhesivelybondedcompositemetalhybridjointsusingcarbonnanotubebasedsensinglayer AT eriktthostenson damagemonitoringofadhesivelybondedcompositemetalhybridjointsusingcarbonnanotubebasedsensinglayer
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Damage monitoring of adhesively bonded composite-metal hybrid joints using carbon nanotube-based sensing layer

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