High resolution radio frequency inspection of carbon fiber composites

Abstract

Eddy current testing is well established for non-destructive testing of electrical conductive materials. 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. 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

A Review on Recycling of Carbon Fibres: Methods to Reinforce and Expected Fibre Composite Degradations

“…Therefore, carbon fibres are the best choice of raw material to manufacture these products. Due to their good electrical conductivity, carbon fibres can be utilised to create electromagnetic interference (EMI) or radiofrequency (RF) shielding as well as electronic device bases [ 10 , 11 ]. Carbon fibres possess good electromagnetic properties, which are the reason for their application in the production of radiological medical equipment.…”

Uncertainty Evaluation in Vision-Based Techniques for the Surface Analysis of Composite Material Components

“…Different methods are proposed in the literature for the measurement of yarn orientation in draped fabrics. For the analysis of intermediate levels, high-frequency eddy current testing is often used for the detection of fabric defects such as gaps and foreign materials [ 14 , 15 , 16 ], or for the visualization of yarns in fabrics [ 3 ]. For this method, the fibers of the composite material have to be conductive, which is the case for carbon fiber fabrics, but not, for example, for glass fiber composites.…”