Computational Model for Armor Penetration

Results are reported from the second year of a three-year BRL/AMMRC/ SRI program to develop a computational capability for predicting the behind-the- armor fragment environment for spaced armor attacked by long-rod penetrators. The baseline materials chosen were rolled homogenous steel armor (RHA) a...

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Bibliographic Details
Main Authors: Erlich, D C, Seaman, L, Curran, D R, Shockey, D A, Caligiuri, R D
Format: Report
Language:English
Subjects:
ANISOTROPY
Armor
BALLISTIC PENETRATORS
BALLISTICS
BASE LINES
COMPUTATIONS
COMPUTER PROGRAMS
COMPUTERIZED SIMULATION
CYLINDRICAL BODIES
DEPLETED URANIUM
EROSION
FAILURE
FRAGMENTATION
LPN-SRI-PYU-7893
MATERIALS
MATHEMATICAL MODELS
PENETRATION
ROLLED HOMOGENEOUS ARMOR
SCALE MODELS
SHEAR BANDING
SHEAR3 COMPUTER PROGRAM
SPACED ARMOR
TEST METHODS
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Summary:Results are reported from the second year of a three-year BRL/AMMRC/ SRI program to develop a computational capability for predicting the behind-the- armor fragment environment for spaced armor attacked by long-rod penetrators. The baseline materials chosen were rolled homogenous steel armor (RHA) and depleted uranium (DU) for the penetrator. Phenomenological studies involving both quarter and full-scale ballistics tests at velocities up to 1.5 km/s and obliquities from 0 to 70 clearly revealed shear banding to be the principal phenomenon controlling both penetrator erosion and armor failure. A detailed, phenomenological scenario for oblique armor penetration is given . Contained fragmenting cylinder (CFC) experiments were performed to characterize the resistance of RHA to shear banding; a significant anisotropy was observed. The SHEAR3 computational model for shear banding was refined and calibrated with respect to previously obtained data from CFC experiments using 4340 steel (Rc40) .