Porosity Content Evaluation in Carbon-Fiber/Epoxy Composites Using X-ray Computed Tomography

In this study we investigate the X-ray computed tomography method for assessment of porosity levels in carbon-fiber/epoxy composites. High resolution computed tomography is used to investigate the distribution, size, and morphology of porosity in composite specimens. The specimens are manufactured with porosity values in ranges that are encountered in the manufacturing of composite structures. Porosity measurement from the optical scans is found to be highly dependent on the number of cross-sections investigated. The stacking sequence is found to have a high effect on the measurements made especially at higher porosity levels due to the preferential alignment of the porosity microstructure.