A Theoretical Investigation of Shock Waves in Water and Water-Polyurethane Mixtures.
AIR FORCE INST OF TECH WRIGHT-PATTERSON AFB OHIO SCHOOL OF ENGINEERING
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A theoretical investigation was made to predict the attentuation of compression waves resulting from impacts into water and water--polyurethane mixtures. Three point source energy release impact theories, one plane impact theory and three mixture theories were used in the investigation. Results from the point source theories were compared with experimental data for impacts into water. All of the theories overpredicted the initial pressure and none of them matched experimental data close enough to determine one superior. The overprediction of initial pressure was due primarily to the assumption that all the projectile kinetic energy is released on impact. Also, a linear Hugoniot equation for water was used that was not valid for the pressure range in which most of the experimental data was taken. Author