CRATERING PRODUCED IN METALS BY HIGHVELOCITY IMPACT
UTAH UNIV SALT LAKE CITY HIGH VELOCITYLAB
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Steel spheres having a diameter of 316 inch 0.476 cm were accelerated with a 220 or 243 caliber smooth-bore gun up to velocities of 2.5 kilometers per second. The area, volume, and depth of the resulting craters were measured and plotted as a function of either the initial impact energy or momentum of the projectile. The crater volume was a linear function of the projectile energy. A relationship existed between the volume per unit energy and the static shear and compressive yield strengths. A plot of crater area versus projectile momentum had two linear segments. A region of negative slope for penetration versus projectile momentum was found for aluminum, lead, and magnesium targets. The other targets did not have this region. Partridge, VanFleet, and Whited PB-128 423 Crater formation in metallic targets. Journal of Applied Physics, 291332-1336 1958 presented data for many of the same targets impacted with spheres of the same material as the target. Comparisons were made between their data and the data obtained using steel spheres for the projectile. Correlation between the data was excellent in most cases.
- Properties of Metals and Alloys