Journal
SENSORS
Volume 16, Issue 8, Pages -Publisher
MDPI
DOI: 10.3390/s16081171
Keywords
carbon nanotube; artificial neuron; strain sensor; composites; structural health monitoring; piezoresistivity; damage detection
Funding
- Research Grant of Pukyong National University
- National Research Foundation of Korea [22A20130012426, 2015R1D1A1A01058115] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
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We present a nanocomposite strain sensor (NCSS) to develop a novel structural health monitoring (SHM) sensor that can be easily installed in a composite structure. An NCSS made of a multi-walled carbon nanotubes (MWCNT)/epoxy composite was installed on a target structure with facile processing. We attempted to evaluate the NCSS sensing characteristics and benchmark compared to those of a conventional foil strain gauge. The response of the NCSS was fairly good and the result was nearly identical to the strain gauge. A neuron, which is a biomimetic long continuous NCSS, was also developed, and its vibration response was investigated for structural damage detection of a composite cantilever. The vibration response for damage detection was measured by tracking the first natural frequency, which demonstrated good result that matched the finite element (FE) analysis.
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