Combining digital image correlation with X-ray computed tomography for characterization of fiber orientation in unidirectional composites

We apply Digital Image Correlation (DIC) to X-ray Computed Tomography (CT) slices for characterization of individual fibers misalignment in continuous fiber composites. This is an atypical application DIC since the input a CT tomogram acquired at one time step, whereas typical deformation analysis 2D images captured over consecutive loading steps. The methodology demonstrated and validated on synchrotron glass/epoxy laminate, where can be clearly identified. It found that average/standard deviation displacement field every slice good estimation actual all fibers’ cross-sections slice. provides shortcut measurement moments orientation distribution, compared algorithms reconstruct center lines. Using this shortcut, was also characterized carbon/epoxy were not observed where, segmentation tools failed characterize fibers. Furthermore, being applied during in-situ tension, employed quantify evolution tension. investigated 3D volumes are provided [1] described [2].