STUDY OF TARGET PENETRATION PREDICTION BY HIGH SPEED AND ULTRA HIGH SPEED BALLISTIC IMPACT
Quarterly rept. no. 4, 1 Apr-30 Jun 1962
HAYES INTERNATIONAL CORP BIRMINGHAM AL
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A statistical analysis of the penetration depth in semi-infinite targets divided by the diameter of the projectile on 1272 experimental shots has been completed. This data was split into 985 low velocity shots and 297 high velocity shots according to the bulk wave velocity in the target material. Separate analyses of the two groups show interesting relationships with existing theoretical and empirical equations. A semi-rational penetration expression has been developed from a work-energy consideration which suggests that the nonrecoverable target compression and shear strain energies may account for most of the kinetic energy of the projectile. Judging from a preliminary comparison with existing experimental data, a penetration model of the form developed shows some promise for predicting impact behavior over a wide velocity range and for different projectile and target materials.