Laser-based surface preparation of composite laminates leads to improved electrodes for electrical measurements
AuthorsAlmuhammadi, Khaled H.
Bera, Tushar Kanti
KAUST DepartmentComposite and Heterogeneous Material Analysis and Simulation Laboratory (COHMAS)
Imaging and Characterization Core Lab
Mechanical Engineering Program
Physical Science and Engineering (PSE) Division
Online Publication Date2015-10-23
Print Publication Date2015-12
Permanent link to this recordhttp://hdl.handle.net/10754/581350
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AbstractElectrical impedance tomography (EIT) is a low-cost, fast and effective structural health monitoring technique that can be used on carbon fiber reinforced polymers (CFRP). Electrodes are a key component of any EIT system and as such they should feature low resistivity as well as high robustness and reproducibility. Surface preparation is required prior to bonding of electrodes. Currently this task is mostly carried out by traditional sanding. However this is a time consuming procedure which can also induce damage to surface fibers and lead to spurious electrode properties. Here we propose an alternative processing technique based on the use of pulsed laser irradiation. The processing parameters that result in selective removal of the electrically insulating resin with minimum surface fiber damage are identified. A quantitative analysis of the electrical contact resistance is presented and the results are compared with those obtained using sanding.
CitationLaser-based surface preparation of composite laminates leads to improved electrodes for electrical measurements 2015 Applied Surface Science
JournalApplied Surface Science