Defect Detection of Carbon Fiber Composite by Eddy Current Sensor

Carbon fiber composite are used in various fields for its good properties, such as high strengthto-weight ratio and rigidity. In order to obtain high reliability of the composite, non-destructive detections are undertaken during fabrication and in application. An eddy current sensor was used to inspect defects in carbon fiber composite plates. The defects were drilled holes in various diameters through or not through the plates. Measurement data were analyzed to identify the positions and basic properties of the defects. Results has shown that less than 1 mm holes in diameter can be identified using a commercial 8 mm sensor for displacement measurement. Suggestions of further work were given.