Journal
SMART MATERIALS AND STRUCTURES
Volume 22, Issue 4, Pages -Publisher
IOP PUBLISHING LTD
DOI: 10.1088/0964-1726/22/4/045008
Keywords
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Funding
- Ministry of Education, Culture, Sports, Science and Technology (MEXT) of Japan [22360044]
- Grants-in-Aid for Scientific Research [22360044] Funding Source: KAKEN
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Compared to conventional metal-foil strain gauges, nanocomposite piezoresistive strain sensors have demonstrated high strain sensitivity and have been attracting increasing attention in recent years. To fulfil their ultimate success, the performance of vapor growth carbon fiber (VGCF)/epoxy nanocomposite strain sensors subjected to static cyclic loads was evaluated in this work. A strain-equivalent quantity (resistance change ratio) in cantilever beams with intentionally induced notches in bending was evaluated using the conventional metal-foil strain gauges and the VGCF/epoxy nanocomposite sensors. Compared to the metal-foil strain gauges, the nanocomposite sensors are much more sensitive to even slight structural damage. Therefore, it was confirmed that the signal stability, reproducibility, and durability of these nanocomposite sensors are very promising, leading to the present endeavor to apply them for static structural health monitoring.
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