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This paper describes the test performed for the optical evaluation of propagating cracks, which assess the severity of trough cracks in composite laminates. The paper begins with the description of the experimental rig designed for dynamically loading the specimens. In particular a modified split- Hopkinson pressure bar for impacts at medium range (10 to 30 m/s) is covered. The specimens are prepared in ordrer to have a mirror reflective surface, by depositing aluminium, which is used to reflect a laser collimated beam in ordre to visualize optically the dynamic event in the crack neighborhood

In-Plane Impact Loading of Composites : Optical Evaluation and Crack Severity Assessment for Graphite- Epoxy