4.7 Article

Self-sensing impact damage in and non-destructive evaluation of carbon fiber-reinforced polymers using electrical resistance and the corresponding electrical route models

期刊

SENSORS AND ACTUATORS A-PHYSICAL
卷 332, 期 -, 页码 -

出版社

ELSEVIER SCIENCE SA
DOI: 10.1016/j.sna.2021.112762

关键词

Carbon fiber; Functional composite; Smart materials; Self-sensing; Non-destructive testing

资金

  1. Human Resources Development grant through the Korea Institute of Energy Technology Evaluation and Planning (KETEP) - Ministry of Trade, Industry and Energy (MOTIE) of Korea [20194030202400]
  2. 2021 Research Fund of UNIST (Ulsan National Institute of Science and Technology) [1.2100038]
  3. Korea Evaluation Institute of Industrial Technology (KEIT) [20194030202400] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)

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This study investigates the mechanical fracture and electromechanical behavior of CFRPs in different orientations, utilizing changes in electrical resistance to monitor impact damage and proposing circuit models and routes for non-destructive evaluation. The research provides new approaches for monitoring and evaluating CFRPs.
Carbon fiber-reinforced plastics (CFRPs) made of uni-directional carbon fibers (UDCFs) are used in various applications such as construction, aerospace, and automobiles. Therefore, their structural health monitoring (SHM) and non-destructive evaluation (NDE) are important to ensure safety during operation. While there is literature on self-sensing of CFRPs to realize various properties, there is no information on their impact self-sensing properties. Therefore, in this study, CFRPs in several orientations were investigated in terms of their mechanical fracture and electromechanical behavior. Changes in their electrical resistance due to impact damage can be utilized for SHM using the corresponding electrically equivalent circuit models. The circuit models constructed consisted of electrical resistors that described the UDCFs. In addition to converting CFRPs into 2D circuits, 3D electrical routes between electrodes were proposed for NDE. Calculating the detour length of the electrical routes using the proposed models helps in assessing the severity of the impact damage. Therefore, the models for CFRPs developed in this study not only provide support for SHM but also for NDE using electrical resistance. (c) 2021 Published by Elsevier B.V.

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