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合成材料:力学,计算和应用
ESCI SJR: 0.193 SNIP: 0.497 CiteScore™: 0.39

ISSN 打印: 2152-2057
ISSN 在线: 2152-2073

合成材料:力学,计算和应用

DOI: 10.1615/CompMechComputApplIntJ.v3.i1.30
pages 35-49

CHARACTERISTIC FEATURES OF PROJECTILE FRAGMENTATION ON A MESH BUMPER AT HIGH-VELOCITY IMPACT

Nikolay Myagkov
Institute of Applied Mechanics of Russian Academy of Sciences
T. A Shumikhin
Institute of Applied Mechanics, Russian Academy of Sciences, Moscow, Russia

ABSTRACT

A high-velocity fragmentation of aluminum and polyethylene projectiles during their interaction with steel mesh bumpers was investigated experimentally and numerically. The projectile velocity in experiments amounted to about 3 km/s. The principal characteristic feature of the projectile destruction on mesh bumpers is the formation of jets of fragments ejected from the frontal part of the projectile in the direction of its motion and in lateral directions. The action of the jets on the witness plate (evaluated by the depths of the craters formed) can exceed the action of the remaining projectile mass. Numerical simulation yields the following estimate of the resulting cumulative effect: when a projectile is aimed at the cell center, the velocity of the frontal part of the jet exceeds the initial projectile velocity by about a factor of 1.5. The numerical simulation also allows one to explain the mechanism underlying the formation of experimentally observed groups of craters distributed linearly over the witness surface.