Review on quality assurance along the CFRP value chain – Non-destructive testing of fabrics, preforms and CFRP by HF radio wave techniques
By H. Heuer, M. Schulze, M. Pooch, S. Gäbler, A. Nocke, G. Bardl, Chokri Cherif, M. Klein, Richard Kupke, R. Vetter and 6 more. 2015
167 citations recorded by the source corpus.
Abstract Eddy current testing is well established for non-destructive testing of electrical conductive materials [1]. The development of radio frequency (RF) eddy current technology with frequency ranges up to 100 MHz made it possible to extend the classical fields of application even towards less conductive materials like CFRP [2] [3](Table 2). It turns out that RF eddy current technology on CFRP generates a growing number of valuable information for comprehensive material diagnostic. Both permittivity and conductivity of CFRP influence the complex impedance measured with RF eddy current devices. The electrical conductivity contains information about fiber texture like orientations, gaps or undulations in a multilayered material. The permittivity characterization influenced by dielectric properties allows the determination of local curing defects on CFRP e.g. hot spots, thermal impacts or polymer degradation. An explanation for that effect is seen in the measurement frequency range and the capacitive structure of the carbon rovings. Using radio wave frequencies for testing, the effect of displacement currents cannot be neglected anymore. The capacitive structures formed by the carbon rovings is supposed to further strengthen the dielectric influences on eddy current measurement signal [3]. This report gives an overview of several realized applications and should be understood as a general introduction of CFRP testing by HF Radio Wave techniques.
Subfields: Mechanical Engineering, Mechanics of Materials, Ocean Engineering
View Paper: https://www.semanticscholar.org/paper/a66eafd9512b5ee67f7af58af10c48cf8170d948
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In Mechanical Engineering
In Mechanics of Materials
Citations in the corpus
- Non-destructive testing and evaluation of composite materials/structures: A state-of-the-art review (2020, methodology): “There are reviews available on NDT methods used for composites research over different timelines, focusing on various aspects: for general methods and trends over last 30 years refer to [4,6–11]; specific areas include those which concentrate on porosity in composite repairs [12], crack damage detec”
- A Review of the Radio Frequency Non-destructive Testing for Carbon-fibre Composites (2016, background): “[42] introduced the high frequency (3 MHz-30 MHz) eddy current (HFEC) technique into the value chain of CFRP composites, from fibre bundle over the fabric/prepreg and preform stage up to components and its life time.”