Accession Number : AD0431199


Title :   PENETRATION OF STRUCTURES BY HYPERVELOCITY PROJECTILES,


Corporate Author : GENERAL ELECTRIC CO PHILADELPHIA PA MISSILE AND SPACE DIV


Personal Author(s) : Heyda,J F ; Riney,T D


Report Date : Feb 1964


Pagination or Media Count : 45


Abstract : During the early stages after impact by a hypervelocity projectile, the cratering process in the target is very nearly governed by the hydrodynamic model except near the edge of the forming cavity. A mathematical model, supported in detail by numerical solutions of the defining partial differential equations, is valid at all axial positions of the peak pressure pulse beyond that point where this pulse is first attenuated by edge rarefaction fronts proceeding from the projectile periphery from the moment of impact. This point occurs a fraction of a microsecond after impact. A detailed study of various impacting metals is made and the theory presented here shows that in the hypervelocity regime a thick target sees no essential difference between geometrically similar projectiles of like material impacting at a given kinetic energy. (Author)


Descriptors :   *HYPERVELOCITY PROJECTILES , PENETRATION , STRUCTURES , CRATERING , PARTIAL DIFFERENTIAL EQUATIONS , GUIDED MISSILES , VULNERABILITY , HYDRODYNAMICS , MATHEMATICAL MODELS , PROGRAMMING LANGUAGES , EQUATIONS , SHOCK(MECHANICS) , IMPACT SHOCK , PROPAGATION , PRESSURE , ALUMINUM , IRON , LEAD(METAL) , EQUATIONS OF STATE , VELOCITY , METAL PLATES , TERMINAL BALLISTICS


Distribution Statement : APPROVED FOR PUBLIC RELEASE