Reactions of a high explosive under low intensity impact with adjustable amplitude and duration.

Laboratory testing with adjustable loading amplitudes and durations remains the primary method for assessment of the safety of explosives under either launch or penetration environment. In this study, a novel impact testing laboratory equipment with loading amplitudes ranging from 0.1 to 1.

Separate Calibration of Johnson-Cook Model for Static and Dynamic Compression of a DNAN-Based Melt-Cast Explosive.

When describing the relation between the flow stress and plastic strain of a material under a wide range of strain rates and temperatures, the original Johnson-Cook model generally requires a complicated modification, resulting in a loss of simplicity and clear physical interpretation. In this paper, without modification, the original Johnson-Cook model was calibrated separately for the static and dynamic compression of a DNAN-based melt-cast explosive. The stress-strain curves for static and dynamic compression of this explosive were experimentally measured with a universal testing machine and a split-Hopkinson pressure bar, respectively.