On the anisotropic behavior of electrodes for electrical-based monitoring of CFRP laminated composites
KAUST DepartmentComposite and Heterogeneous Material Analysis and Simulation Laboratory (COHMAS)
Mechanical Engineering Program
Physical Science and Engineering (PSE) Division
KAUST Grant NumberBAS/1/1315-01-01
Online Publication Date2018-11-03
Print Publication Date2019-05
Permanent link to this recordhttp://hdl.handle.net/10754/630591
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AbstractElectrical 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, CO2 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
CitationAlmuhammadi K, Yudhanto A, Lubineau G (2018) On the anisotropic behavior of electrodes for electrical-based monitoring of CFRP laminated composites. Polymer Composites. Available: http://dx.doi.org/10.1002/pc.24987.
SponsorsThis research was also partially supported by King Abdullah University of Science and Technology (KAUST) Baseline Research Funds under award number BAS/1/1315-01-01.