Accession Number : AD0707837

Title :   AN INVESTIGATION OF PERFORATION MECHANICS IN THIN ALUMINUM PLATES.

Descriptive Note : Master's thesis,

Corporate Author : AIR FORCE INST OF TECH WRIGHT-PATTERSON AFB OHIO SCHOOL OF ENGINEERING

Personal Author(s) : Gabbert,Richard David

Report Date : JUN 1970

Pagination or Media Count : 78

Abstract : The Nishiwaki theory of penetration was investigated for seven projectile shapes against three thicknesses of 6061-T6 aluminum target material. The projectiles were fired from a 50 caliber gun at impact velocities near 500 m/sec. Initial velocities and projectile velocity losses were measured by flash x-rays and chronographs. The same projectile shapes were also used to perforate identical targets quasi-statically with a laboratory universal testing machine. This provided the empirical information necessary to the application of the Nishiwaki theory. The basic Nishiwaki equations were found to be inaccurate for most projectile shapes. A modification of this theory was investigated and found to be accurate in predicting projectile velocity losses to within 8 m/sec at impact velocities near 500 m/sec. Additional proposed penetration models are presented but not investigated. (Author)

Descriptors :   (*AIRFRAMES, ANTIAIRCRAFT GUNNERY), (*METAL PLATES, TERMINAL BALLISTICS), TITANIUM ALLOYS, SABOT PROJECTILES, PENETRATION, CYLINDRICAL BODIES, CONICAL BODIES, EXPERIMENTAL DATA, THEORY, THESES

Subject Categories : Aircraft
      Metallurgy and Metallography
      Ballistics

Distribution Statement : APPROVED FOR PUBLIC RELEASE