Abstract: Three kinds of X-ray CT imaging detection methods including X-ray tomography CT imaging detection method, X-ray spiral CT imaging detection method and X-ray cone beam CT imaging detection method were used to detect carbon fiber matrix composites with prefabricated mechanical processing simulated delamination defects. These X-ray CT imaging detection methods are compared from three aspects, i.e., detection speed, image quality and defect resolution. The results show that the detection method of X-ray cone beam CT imaging has the highest detection efficiency, the best image quality and the smallest defect size measurement error in the detection of delamination defects in composite materials. It provides a reference for the selection of other defects in composite materials.

Key words: X-ray CT imaging detection, composite material, selection of detection methods