SHOCK-WAVE VELOCITY AND SHOCK PRESSURE FOR LOW-DENSITY POWDERS - A NOVEL-APPROACH

A novel approach is presented to predict the shock wave velocity as we ll as the shock wave pressure in powder materials. It is shown that th e influence of the specific volume behind the shock wave on shock wave velocity and shock pressure decreases with decreasing initial powder density. The new model is compared with experimental data of various m aterials: Fe, Cu, Al, C, UO2, Ce2O3, SiO2 (quartz), NaCl, and polystyr ene. It is concluded that the model holds in particular for initial po wder densities less than 50% and for flyer plate velocities up to 5 km /s.