Abstract

Electrical impedance tomography (EIT) is a promising structural health monitoring technique for carbon fiber-reinforced polymer (CFRP) composites. EIT technique has been specifically adopted as a non-destructive testing method along with the electrical characterization methods. Electrodes are the primary component in any EIT system because they act as an interface connecting the instrument/hardware to the structure under inspection. Simulation of electrical inspection of CFRP usually assumes the electrodes to be electrically isotropic interfaces. We show here that such isotropic assumption is a very poor approximation. We experimentally investigated the electrodes contact impedance behavior on CFRP-laminated composite specimens for different surface processing (sanding, CO 2 laser, and Yb-fiber laser). The effective electrical responses of electrodes are characterized in-depth, so an accurate description can be proposed. Our findings emphasize that the electrodes contact impedance is strongly anisotropic and varies largely between the on-axis (along surface fibers) and the off-axis (bias and perpendicular to the surface fibers) for all tested surface processing. POLYM. COMPOS., 2018. © 2018 Society of Plastics Engineers.

Department(s)

Mechanical and Aerospace Engineering

Publication Status

Full Access

Comments

King Abdullah University of Science and Technology, Grant BAS/1/1315-01-01

International Standard Serial Number (ISSN)

1548-0569; 0272-8397

Document Type

Article - Journal

Document Version

Citation

File Type

text

Language(s)

English

Rights

© 2025 Wiley; Society of Plastics Engineers, All rights reserved.

Publication Date

01 May 2019

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