TR2020-148

Contactless Eddy Current Sensing for Carbon Fiber Reinforced Polymer Defect Detection


    •  Wang, B., Hotta, A., "Contactless Eddy Current Sensing for Carbon Fiber Reinforced Polymer Defect Detection", Biennial IEEE Conference on Electromagnetic Field Computation (CEFC), November 2020.
      BibTeX TR2020-148 PDF
      • @inproceedings{Wang2020nov2,
      • author = {Wang, Bingnan and Hotta, Akira},
      • title = {Contactless Eddy Current Sensing for Carbon Fiber Reinforced Polymer Defect Detection},
      • booktitle = {Biennial IEEE Conference on Electromagnetic Field Computation (CEFC)},
      • year = 2020,
      • month = nov,
      • url = {https://www.merl.com/publications/TR2020-148}
      • }
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  • Research Areas:

    Applied Physics, Multi-Physical Modeling, Signal Processing

Abstract:

Carbon fiber reinforced polymer (CFRP) is a high performance material that is both mechanically strong and light weight. It has seen wide applications in aerospace and civil engineering, and is being used in high-end consumer products. The composite material is composed of a polymer resin reinforced by carbon fibers. One drawback of CFRP is its susceptibility to impact damages, which raises the need for structural health monitoring. The problem has been a subject of active research recently, with many techniques proposed, including resistance method, electric potential sensing, digital image correlation, and thermal imaging [1]. Compared with these methods, eddy current sensing has advantages in contactless, reliable, and low cost [2]. The challenge in applying it to CFRP lies in the unique electric property: the conductivity is anisotropic, with higher value in the fiber direction (on order of 104 S/m, much smaller than noble metals), and much lower value in other directions (on order of 100 S/m). Therefore, the feasibility of eddy current sensing has to be investigated for CFRP defect detection