Nanotube-based sensing skins for crack detection and impact monitoring of structures

K. J. Loh, T. C. Hou, J. R. Lynch, N. A. Kotov

Research output: Chapter in Book/Report/Conference proceedingConference contribution

21 Citations (Scopus)

Abstract

Structural health monitoring (SHM) entails the use of structural response data to identify the existence, location, and severity of structural damage. However, damage detection is a challenging problem because damage is a local phenomenon difficult to observe using global measures of structural response. With the existence and location of damage unknown a priori, sensor strategies monitoring the structure at the component-level would require dense arrays of sensors. Alternatively, this study proposes a sensing skin that can be applied to structural surfaces to monitor the strain response of the structure and the evolution of cracks. A multilayered single wall carbon nanotube-polyelectrolyte composite thin film is proposed as a sensing skin because it is piezoresistive and can be adsorbed to metallic surfaces. Electrical impedance tomography (E1T) is used to reconstruct the distribution of the sensing skin conductivity using voltage measurements taken on the boundary of the skin when regulated electrical currents are applied. The method is capable of imaging cracks in cementitious elements in addition to impact damage in aluminum plates.

Original languageEnglish
Title of host publicationStructural Health Monitoring 2007
Subtitle of host publicationQuantification, Validation, and Implementation - Proceedings of the 6th International Workshop on Structural Health Monitoring, IWSHM 2007
EditorsFu-Kuo Chang
PublisherDEStech Publications
Pages1685-1692
Number of pages8
ISBN (Electronic)9781932078718
Publication statusPublished - 2007
Event6th International Workshop on Structural Health Monitoring: Quantification, Validation, and Implementation, IWSHM 2007 - Stanford, United States
Duration: 2007 Sep 112007 Sep 13

Publication series

NameStructural Health Monitoring 2007: Quantification, Validation, and Implementation - Proceedings of the 6th International Workshop on Structural Health Monitoring, IWSHM 2007
Volume2

Other

Other6th International Workshop on Structural Health Monitoring: Quantification, Validation, and Implementation, IWSHM 2007
Country/TerritoryUnited States
CityStanford
Period07-09-1107-09-13

All Science Journal Classification (ASJC) codes

  • Computer Science Applications
  • Health Information Management

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