Digital Laser High-speed Photography System and Its Application in Photomechanical Tests with Blast Loading

For the high speed data acquisition in photomechanical tests with blast loading, a digital laser high-speed photography system consisting of a pumped laser and the Fastcam- SA5 digital high- speed camera is built and applied to the caustics, the photoelasticity, and the schlieren experiments, combining with a blast loading setup. It is shown that the images of the caustics at the running crack tip, the arithmetic line stripes on the surface of photoelastic model specimens, and the propagation process of the blasting wave in the air from charging with slots are recorded clearly, indicating that the new digital laser high-speed photography system is reliable. Also the concept of one system, various experiments is realized, which provides some new testing methods and new application fields in blasting mechanics.