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ACTA AERONAUTICAET ASTRONAUTICA SINICA ›› 2022, Vol. 43 ›› Issue (1): 424949.doi: 10.7527/S1000-6893.2020.24949

• Material Engineering and Mechanical Manufacturing • Previous Articles     Next Articles

On-line damage monitoring of composites based on carbon nanotube films

QU Shuxuan1,2, GONG Wenbin2, SUN Xiaozhu3, ZHANG Dongxing1, LIANG Zhiqiang4, GAO Limin5, LYU Weibang2   

  1. 1. School of Materials Science and Engineering, Harbin Institute of Technology, Harbin 150001, China;
    2. Innovation Center for Advanced Nanocomposites, Suzhou Institute of Nano-Tech and Nano-Bionics, Chinese Academy of Sciences, Suzhou 215123, China;
    3. General Research Office of Space Science and Machinery, Shanghai Institute of Aerospace Systems Engineering,Shanghai 201108, China;
    4. Institute of Functional Nano and Soft Materials, Soochow University, Suzhou 215123, China;
    5. Department of Structural Integrity, COMAC Beijing Aeronautical Science &Technology, Beijing 102211, China
  • Received:2020-11-05 Revised:2021-01-11 Online:2022-01-15 Published:2021-01-08
  • Supported by:
    National Natural Science Foundation of China (51503225)

Abstract: Considering that fiber-reinforced polymeric composites would be damaged due to impact, compression, fatigue and other factors during service, a composite with on-line damage self-sensing capabilities was developed based on carbon nanotube films, which possess desirable mechanical and electrical properties. Using the conductive network formed by carbon nanotubes, the damage of composites will destroy the conductive path and greatly increase the resistance of carbon nanotube films. The on-line self-sensing of composite damages was realized by measuring the boundary voltage of the composite, and then solving/imaging the conductivity distribution within the composite through the Electrical Resistance Tomography. Both damages of through-hole and model-I interlaminar fracture were investigated, and the results show that for these two damage modes, the obtained composite can realize on-line damage localization as well as damage display through EIT image reconstruction. For the through hole damage mode, the damage with an area accounting for 0.038% can be monitored online. In addition, the accuracy of through-hole localization can reach millimeter level.

Key words: carbon nanotube, composite, structural health monitoring, electrical impedance tomography, on-line monitoring

CLC Number: