Damage detection in smart CFRP composites using impedance spectroscopy

Pohl, Jiirgen; Herold, Sven; Mook, Gerhard; Michel, Fritz

doi:10.1088/0964-1726/10/4/328

Cited by 39 publications

(19 citation statements)

References 19 publications

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“…A constant amplitude sinusoidal electrical current is injected at different frequencies to identify the change in frequency of the impedance (Z) of the sample. EIS has been used in noninvasive material characterization of different composite materials [31,27,33,26] including fibre-reinforced polymers [33]. EIS has also been found to be useful in monitoring the cure of plastics [26] during their manufacturing process.…”

Section: Impedance-based Cfrp Composite Characterizationmentioning

confidence: 99%

Laser-based surface preparation of composite laminates leads to improved electrodes for electrical measurements

Almuhammadi

Selvakumaran

Alfano

et al. 2015

Applied Surface Science

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Laserbased surface preparation of composite laminates leads to improved electrodes for electrical measurements, Applied Surface Science (2015), http://dx.doi.org/10.1016/j.apsusc. 2015.10.086 This is a PDF file of an unedited manuscript that has been accepted for publication. As a service to our customers we are providing this early version of the manuscript. The manuscript will undergo copyediting, typesetting, and review of the resulting proof before it is published in its final form. Please note that during the production process errors may be discovered which could affect the content, and all legal disclaimers that apply to the journal pertain.Page 1 of 32 A c c e p t e d M a n u s c r i p t 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.

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Section: Impedance-based Cfrp Composite Characterizationmentioning

confidence: 99%

Laser-based surface preparation of composite laminates leads to improved electrodes for electrical measurements

Almuhammadi

Selvakumaran

Alfano

et al. 2015

Applied Surface Science

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“…Pohl et al [92] implemented an experimental and theoretical investigation to show the effectiveness of the impedance method in monitoring carbon fiber reinforced polymer (CFRP) composites. Damage, which was introduced by the low-speed impact, was detected by changes in the impedance signatures.…”

Section: Recent Applicationsmentioning

confidence: 99%

Structural Health Monitoring Using High-Frequency Electromechanical Impedance Signatures

Yan

Chen

2010

Advances in Civil Engineering

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An overview of recent advances in electromechanical impedance-(EMI-) based structural health monitoring is presented in this paper. The basic principle of the EMI method is to use high-frequency excitation to sense the local area of a structure. Changes in impedance indicate changes in the structure, which in turn indicate that damages appear. An accurate EMI model based on the method of reverberation-ray matrix is introduced to correlate changes in the signatures to physical parameters of structures for damage detection. Comparison with other numerical results and experimental data validates the present model. A brief remark of the feasibility of implementing the EMI method is considered and the effects of some physical parameters on EMI technique are also discussed.

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“…Electro-mechanical impedance based damage detection on CFRP composite laminates was investigated by Pohl et al [34]. Delamination due to impacts was shown to influence the real part of the impedance magnitude and resonant peaks within the spectrum above 1 kHz.…”

Section: Z(ω)mentioning

confidence: 99%

Structural Diagnostics of CFRP Composite Aircraft Components by Ultrasonic Guided Waves and Built-In Piezoelectric Transducers

Matt

2006

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Damage detection in smart CFRP composites using impedance spectroscopy

Cited by 39 publications

References 19 publications

Laser-based surface preparation of composite laminates leads to improved electrodes for electrical measurements

Laser-based surface preparation of composite laminates leads to improved electrodes for electrical measurements

Structural Health Monitoring Using High-Frequency Electromechanical Impedance Signatures

Structural Diagnostics of CFRP Composite Aircraft Components by Ultrasonic Guided Waves and Built-In Piezoelectric Transducers

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