WEDGE PENETRATION IN A THICK TARGET.
NAVAL WEAPONS LAB DAHLGREN VA
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Analysis of the penetration of a wide wedge into a thick aluminum target was compared with penetration experiments at velocities from 1 to 500 ft sec. The penetration data follow the rough wedge solution at low velocity but approach the frictionless case at several hundred ftsec. This behavior is ascribed to adiabatic heating and consequent softening of target material adjacent to the penetrator. It was concluded that a strain-rateinsensitive Tresca yield stress is a satisfactory constitutive equation for the material but that work-hardening and thermal phenomena must be included for accurate analysis. Author