Accession Number : AD0463378

Title :   HYPERVELOCITY IMPACT OF BRITTLE MATERIALS,

Corporate Author : AIR FORCE FLIGHT DYNAMICS LAB WRIGHT-PATTERSON AFB OH

Personal Author(s) : McGuire, Ralph L., Jr. ; Atkinson, Dale B.

Report Date : FEB 1965

Pagination or Media Count : 32

Abstract : Aluminum oxide and fused silica were subjected to simulated micrometeoroid impact, and the results were recorded in tabular and semi-log plot forms. The particles used for this study were 50-micron diameter borosilicate spheres having a mass of 1.45 x 10 to the minus 7 power grams and 1/16-inch diameter aluminum spheres having a mass of 0.585 x 10 to the minus 2 power grams. Velocities recorded varied from 13,000 to 47,000 feet per second. Typical craters formed by the various conditions of impact are pictorically presented. Penetration parameter versus velocity equations through the fifth degree were determined, and first degree fits are plotted. It is concluded that brittle materials suffer severe damage under meteoroid impact conditions, and further studies are necessary to define the actual magnitude of this damage. (Author)

Descriptors :   (*IMPACT SHOCK, ALUMINUM COMPOUNDS), (*METEORS, DAMAGE), BRITTLENESS, HYPERVELOCITY PROJECTILES, OXIDES, SILICATES, CRATERING, PENETRATION, METEORITES, REENTRY VEHICLES, VULNERABILITY.

Distribution Statement : APPROVED FOR PUBLIC RELEASE