The main objective of this research is to visualize the normal debonding event in real time under dynamic loading condition to study the crack initiation and progression along the fiber-matrix interface. A modified tension Kolsky bar was integrated with a high-speed synchrotron X-ray phase contrast imaging (PCI) to record the loading history and high-speed images subjected to the debonding event. The specimens were made by SC-15 epoxy and S-2 glass fiber in a cruciform transverse debonding configuration. These specimens were pulled at the loading velocity at 2.5 and 5.0 m/s. The results showed that the crack propagation speed increased with increasing loading velocity. The force-displacement curves are linear at 2.5 m/s and non-linear at 5.0 m/s. However, the maximum debonding force exhibited little to no change with increasing loading velocity. Scanning electron microscopy images of the recovered cruciform specimens revealed that severe damage on the specimen that been pulled at 5.0 m/s as compared to 2.5 m/s. MTS 810 will be utilized to perform quasi-static experiments on these specimens to determine the debonding properties under different loading rate.