Structural health monitoring using carbon nanotube/epoxy composites and strain-field pattern recognition

Erick Giraldo-Pérez, Joham Alvarez-Montoya, Hader Vladimir Martínez Tejada, Julián Sierra-Pérez

    Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

    Abstract

    Structural Health Monitoring (SHM) aims to reduce costs and uncertainties in maintenance of aero-structures and wind turbines blades by using smart sensors. In this work, a Carbon Nanotube (CNT)/epoxy nanocomposite patch was developed for SHM based on strain field pattern recognition techniques in engineering structures. This relies on the piezoresistive capabilities of CNT nanocomposites and on the fact that damage occurrence produces changes in the strain field that can be detected by means of pattern recognition. Experimental tests were carried out by bonding the patch to an aluminum I-beam subjected to different load magnitudes in three-point bending. Resistance measurements were acquired from the patch using a multiplexed impedance tester in order to obtain 64 measurements that are correlated to strains in different directions. Then, the same experimental tests were carried out after inducing an artificial damage. The preliminary results showed that standardization needs to be performed to decouple changes due to the load magnitude from those produced by damage occurrence. In addition, slight changes in the strain field were noted in the standardized data for the damage condition. Future work will consist of implementing pattern recognition techniques to automatically detect such changes associated with damage occurrence and validate the methodology with different kind of damages.

    Original languageEnglish
    Title of host publication3rd joint International Conference on Energy Engineering and Smart Materials, ICEESM 2018 and International Conference on Nanotechnology and Nanomaterials in Energy, ICNNE 2018
    EditorsTatiana Perova
    PublisherAmerican Institute of Physics Inc.
    ISBN (Print)9780735417205
    DOIs
    StatePublished - 17 Aug 2018
    Event3rd joint International Conference on Energy Engineering and Smart Materials, ICEESM 2018 and International Conference on Nanotechnology and Nanomaterials in Energy, ICNNE 2018 - Milan, Italy
    Duration: 22 Jun 201824 Jun 2018

    Publication series

    NameAIP Conference Proceedings
    Volume2004
    ISSN (Print)0094-243X
    ISSN (Electronic)1551-7616

    Conference

    Conference3rd joint International Conference on Energy Engineering and Smart Materials, ICEESM 2018 and International Conference on Nanotechnology and Nanomaterials in Energy, ICNNE 2018
    Country/TerritoryItaly
    CityMilan
    Period22/06/1824/06/18

    Bibliographical note

    Funding Information:
    The authors thank to Centro de Investigación para el Desarrollo y la Innovación (CIDI) from Universidad Pontificia Bolivariana for funding this research under Grant No. 440B-08/15-18.

    Publisher Copyright:
    © 2018 Author(s).

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