Accession Number : ADA190757

Title :   Computational Model for Armor Penetration.

Descriptive Note : Annual rept. no. 3, Oct 80-Apr 83,

Corporate Author : SRI INTERNATIONAL MENLO PARK CA

Personal Author(s) : Erlich, D C ; Seaman, L ; Cooper, T ; Caligiuri, R D ; Curran, D R

PDF Url : ADA190757

Report Date : Oct 1987

Pagination or Media Count : 116

Abstract : This is the first volume of a two-volume series comprising the third annual report for the program Computational Model for Armor Penetration. The objective of the program was to develop a phenomenologically sound material disintegration model for computationally simulating armor penetration by projectile impact. The model would provide the capability to predict the ballistic limit and downrange fragment size and velocity distributions and would eventually be used by the DoD for armor and penetrator design. The materials studied in the program were 4340 steel and depleted uranium alloy, (DU) for the penetrators, and rolled homogeneous armor (RHA) for the target. This Volume reports on the experimental and analytical work performed during the third year to conclude the development of a computational model, SHEAR3, that describes the dominant material failure and fragmentation process (adiabatic shear banding) responsible for long-rod penetrator erosion and thick armor plate plugging and fragmentation. Volume 1 also describes application of SHEAR3 with the Lagrangian wave propagation code C-HEMP to computationally simulate penetration of armor plate by normally impacting long rods both near the ballistic limit and at higher velocities sufficient to produce significant back-of-the-armor fragmentation. Keywords: Metallurgical analysis; Shear band kinetics; Computerized simulation.

Descriptors :   *ARMOR PLATE, *PENETRATION, ACOUSTIC MATERIALS, ADIABATIC CONDITIONS, ARMOR, BALLISTICS, COMPUTATIONS, COMPUTERIZED SIMULATION, DEPLETED URANIUM, DISINTEGRATION, DISTRIBUTION, FAILURE, FRAGMENTATION, FRAGMENTS, HOMOGENEITY, IMPACT, LIMITATIONS, MATERIALS, MATHEMATICAL MODELS, MODELS, PLUGGING, PROJECTILES, RODS, ROLLING(METALLURGY), SHEAR PROPERTIES, SIZES(DIMENSIONS), THICKNESS, URANIUM ALLOYS, VELOCITY

Subject Categories : Armor
      Metallurgy and Metallography

Distribution Statement : APPROVED FOR PUBLIC RELEASE