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Sensors 2016, 16(3), 400; doi:10.3390/s16030400

Self-Sensing of Damage Progression in Unidirectional Multiscale Hierarchical Composites Subjected to Cyclic Tensile Loading

Centro de Investigación Científica de Yucatán A.C., Unidad de Materiales, Calle 43 No.130, Col. Chuburná de Hidalgo. C.P. 97200, Mérida, Yucatán, Mexico
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Academic Editor: Jandro L. Abot
Received: 25 February 2016 / Revised: 12 March 2016 / Accepted: 15 March 2016 / Published: 18 March 2016
(This article belongs to the Special Issue Integrated Structural Health Monitoring in Polymeric Composites)
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Abstract

The electrical sensitivity of glass fiber/multiwall carbon nanotube/vinyl ester hierarchical composites containing a tailored electrically-percolated network to self-sense accumulation of structural damage when subjected to cyclic tensile loading-unloading is investigated. The hierarchical composites were designed to contain two architectures differentiated by the location of the multiwall carbon nanotubes (MWCNTs), viz. MWCNTs deposited on the fibers and MWCNTs dispersed within the matrix. The changes in electrical resistance of the hierarchical composites are associated to their structural damage and correlated to acoustic emissions. The results show that such tailored hierarchical composites are able to self-sense damage onset and accumulation upon tensile loading-unloading cycles by means of their electrical response, and that the electrical response depends on the MWCNT location. View Full-Text
Keywords: hierarchical composites; carbon nanotubes; damage sensing; damage accumulation; cyclic loading hierarchical composites; carbon nanotubes; damage sensing; damage accumulation; cyclic loading
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MDPI and ACS Style

Ku-Herrera, J.J.; Pacheco-Salazar, O.F.; Ríos-Soberanis, C.R.; Domínguez-Rodríguez, G.; Avilés, F. Self-Sensing of Damage Progression in Unidirectional Multiscale Hierarchical Composites Subjected to Cyclic Tensile Loading. Sensors 2016, 16, 400.

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