Accession Number : AD0912021

Title :   Response of Materials to Impulsive Loading.

Descriptive Note : Technical rept. 1 Apr 70-1 Dec 72,

Corporate Author : DAYTON UNIV OH RESEARCH INST

Personal Author(s) : Lee, Thomas W. ; Swift, Hallock F. ; Preonas, Diamantis D. ; Dueweke, Paul W. ; Bertke, Robert S.

Report Date : FEB 1973

Pagination or Media Count : 75

Abstract : Six major studies including Hypervelocity Impact, Planar Impact, Ballistic Velocity Impact Testing, Pebble Impact, Rain Erosion, and Foreign Object Damage, are carried out. In the Hypervelocity Impact studies the effects of material strength properties on crater growth were examined in thick targets, also the peak normal stress behind the shock wave was measured as a function of distance and angle. The response of thin targets to hypervelocity impact was examined as a function of the residual state of the debris material. Significant results are shown. Two methods to produce Planar Impacts are described with the merits and limitations of each discussed. Planar impact by explosive driven flyer plate was used to describe the behavior of shock loaded material in the presence of a phase change. Ballistic Impact Studies examined the response of both the projectile and the target. The Pebble Program supported the Space and Missile Systems Office in analyzing the problems of retro-fit hardening of vehicles against pebble impact and in extensive testing of proposed fixes. The Rain Erosion effort was basically an equipment development program to produce an instrument to simulate rain impacts at high velocities and to measure the damage caused by them in representative vehicle materials. The camera system developed is described. Initial laboratory investigations of Foreign Object Damage (FOD) to simulated aircraft compressor blades are described. (Author, modified-PL)

Descriptors :   *IMPACT SHOCK), (*MATERIALS, (*HYPERVELOCITY PROJECTILES, IMPACT), LOADS(FORCES), HYPERVELOCITY PROJECTILES, DAMAGE, EROSION, RAIN, PELLETS, COMPOSITE MATERIALS, ALUMINUM ALLOYS, CRATERING, ARMOR PLATE, CERAMIC MATERIALS, COMPRESSOR BLADES, TITANIUM ALLOYS, AIRCRAFT ENGINES, INSTRUMENTATION, TEST METHODS, TARGETS, EQUATIONS OF STATE, CLOUDS, DUST, LASERS.

Subject Categories : Miscellaneous Materials
      Guns

Distribution Statement : APPROVED FOR PUBLIC RELEASE