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Park, Young-Bin
Functional Intelligent Materials Lab (FIMLab)
Research Interests
  • Composites
  • Nanocomposites
  • Smart Materials and Structures
  • Carbon Nanomaterials

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Structural health monitoring of CFRPs using electrical resistance by reduced peripheral electrodes

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Title
Structural health monitoring of CFRPs using electrical resistance by reduced peripheral electrodes
Author
Park, Young-BinRoh, Hyung DohLee, In Yong
Issue Date
2021-12
Publisher
TECHNO-PRESS
Citation
SMART STRUCTURES AND SYSTEMS, v.28, no.6, pp.737 - 744
Abstract
In this study, structural health monitoring (SHM) methods of carbon fiber reinforced plastics (CFRPs) were investigated using electrical resistance. The developed sensing technique monitored electrical resistance in accordance with the impact damage of a CFRP. The changes in electrical resistances with multiple electrode sets enabled SHM without extra sensors so that this technique can be called self-sensing. Moreover, this study proposed electrodes only at peripheral side of a structure to minimize the number of electrodes compared to those in an array which has square number of sensors as the sensing area increases. For the intensive investigation, electromechanical sensitivity in terms of electrode distance was analyzed and optimized under drop weight impact testing. Then, SHM methods with electrodes in an array and electrodes in peripheral edges were comparatively investigated. The developed methods successfully localized impact damages into 2D coordinates. Furthermore, damage severity can be shown with a damage map by calculating electrical resistance change ratio. Therefore, structural health self-sensing system using electrical resistance was successfully developed with the minimum number of electrodes.
URI
https://scholarworks.unist.ac.kr/handle/201301/55131
URL
http://www.techno-press.org/content/?page=article&journal=sss&volume=28&num=6&ordernum=2
DOI
10.12989/sss.2021.28.6.737
ISSN
1738-1584
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