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Ultra-High-Speed Photography and Optical Flash Measurement of Nylon Sphere Impact Phenomena
An optical spike is sometimes observed prior to the main flash in high-velocity impact experiments. The spikes are particularly noticeable in the case of Nylon66 projectiles. In this study, we conducted experiments in which Nylon66 spheres impacted the flat surfaces of Nylon66 blocks perpendicularly at 7 km s -1 . We observed the impact phenomena by using an ultra-high-speed camera and high-temporalresolution photometers to identify the cause of the spikes. High-speed photographs show that thedoi:10.1016/j.proeng.2015.04.085 fatcat:5akayox5s5d73hhhvck3ycy7u4