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Structural Health Monitoring of Repairs in Carbon-Fiber-Reinforced Polymer Composites by MWCNT-Based Multiscale Sensors

Author

Listed:
  • Wenlong Hu

    (School of Aerospace Engineering and Applied Mechanics, Tongji University, Shanghai 200092, China)

  • Zijie Sun

    (Beijing Spacecrafts, China Academy of Space Technology, Beijing 100094, China)

  • Lulu Yang

    (School of Aerospace Engineering and Applied Mechanics, Tongji University, Shanghai 200092, China)

  • Shuzheng Zhang

    (School of Aerospace Engineering and Applied Mechanics, Tongji University, Shanghai 200092, China)

  • Fangxin Wang

    (College of Architectural Science and Engineering, Yangzhou University, Yangzhou 225127, China)

  • Bin Yang

    (School of Aerospace Engineering and Applied Mechanics, Tongji University, Shanghai 200092, China)

  • Yu Cang

    (School of Aerospace Engineering and Applied Mechanics, Tongji University, Shanghai 200092, China)

Abstract

The precision maintenance of delaminated carbon-fiber-reinforced polymer composites calls for the high demand of continuous, in situ monitoring of the damage-repair process along with the in-service status of the repaired region. Moreover, the repaired region faces a high risk of re-damage; therefore, in-service monitoring is highly desired. However, the current repair process lacks the in situ monitoring function, leading to the mechanism and evaluation of the repair approach being unclear. Here, we implanted multi-wall carbon nanotubes (MWCNTs) at the interface between the carbon fiber and resin matrix of the damaged region to achieve in situ monitoring of the repair, compression, and seawater-immersion processes. By depositing both the coupling agent and MWCNTs at the interfaces, a high recovery efficiency of 85% was achieved, which was independent of the delamination pattern shapes. The electric resistance changes of MWCNT-modified panels could effectively identify the resin permeation and solidification processes and could be used to in situ monitor the structural health of the repair region when it is subjected to the compression and seawater immersion tests. This strategy, combining high-efficient repair and precision maintenance, demonstrates potential in the structural applications of carbon-fiber-reinforced polymer composites.

Suggested Citation

  • Wenlong Hu & Zijie Sun & Lulu Yang & Shuzheng Zhang & Fangxin Wang & Bin Yang & Yu Cang, 2022. "Structural Health Monitoring of Repairs in Carbon-Fiber-Reinforced Polymer Composites by MWCNT-Based Multiscale Sensors," Energies, MDPI, vol. 15(22), pages 1-9, November.
    • Handle: RePEc:gam:jeners:v:15:y:2022:i:22:p:8348-:d:966817
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    References listed on IDEAS

    as
    1. Yu Cang & Wenlong Hu & Dalei Zhu & Lulu Yang & Chaojie Hu & Yiwen Yuan & Fangxin Wang & Bin Yang, 2022. "In Situ Thermal Ablation Repair of Delamination in Carbon Fiber-Reinforced Thermosetting Composites," Energies, MDPI, vol. 15(19), pages 1-10, September.
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    Cited by:

    1. Vigneselvan Sivasubramaniyam & Suganthi Ramasamy & Manikandan Venkatraman & Gianluca Gatto & Amit Kumar, 2023. "Carbon Nanotubes as an Alternative to Copper Wires in Electrical Machines: A Review," Energies, MDPI, vol. 16(9), pages 1-17, April.

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