Accession Number : ADA328643

Title :   Normal and Oblique Impact of Cylindro-Conical and Cylindrical Projectiles on Metallic Plates

Descriptive Note : Final rept. Jun 82-Jan 84

Corporate Author : CALIFORNIA UNIV BERKELEY DEPT OF MECHANICAL ENGINEERING

Personal Author(s) : Goldsmith, Werner ; Finnegan, Stephen A.

PDF Url : ADA328643

Report Date : JUN 1985

Pagination or Media Count : 115

Abstract : An experimental program has been undertaken to study the phenomenon of both normal and oblique impact of cylindro-conical and cylindrical projectiles on metallic plates, a domain where almost no test data is available. Hard-steel strikers of 12.7-mm nominal diameter and either 60-degree conical or blunt tips and blunt soft aluminum cylinders of the same diameter were fired at 2024-0 aluminum targets with thicknesses from 1.78 to 25.4-mm and at both mild steel and medium carbon steel with thicknesses up to 19.05-mm. Initial velocities ranged from about 20 to 1025 m/s, achieved with the aid of a pneumatic cannon at low speeds and a powder gun in the upper velocity range. Initial target obliquity was varied from normal to 50 degrees. The primary results obtained involved the measurement of the velocity drop and change in projectile orientation as the result of passage through the target. Special attention was devoted to the definition of the ballistic limit for certain projectile-target combinations. The target deformation, consisting of dishing, petals, plugs, and bands separated from the crater, was examined and metallurgical determinations were executed for a selected set of runs. Projectile distortion or fragmentation were also noted and examined. The information obtained should provide an excellent basis for understanding the mechanisms involved in this type of impact and perforation. It will also serve as a reliable source of data for comparison with the predictions from analytical models of the process which do not currently exist, but will most certainly be developed in the future.

Descriptors :   *BALLISTICS, *PERFORATION, PROJECTILES, IMPACT TESTS, TARGETS, STEEL, ALUMINUM, METAL PLATES.

Subject Categories : Ballistics

Distribution Statement : APPROVED FOR PUBLIC RELEASE