Engineering Transactions, 60, 1, pp. 15–29, 2012

Perforation Modes of Metal Plates Struck by a Blunt Rigid Projectile

China Academy of Engineering Physics Institute of Structural Mechanics

Southwest University of Science & Technology School of Civil Engineering

The present paper analyzes the possible modes of shear plugging and adiabatic shear
plugging in the perforation of metal plates struck by a blunt rigid projectile. The modified
ballistic limit and residual velocity under the condition of adiabatic shear plugging are further
formulated. Further experimental analyses are conducted on the perforations of Weldox E
steel plates in order to discuss the effects of plate thickness and material strength/hardness on
the terminal ballistic performance. More experimental evidence confirms the jump of residual
velocity at the ballistic limit induced by the structural response of the plate. With increasing
the thickness of plate and the material strength, failure modes of the plate may transform from
shear plugging to adiabatic shear plugging.
Keywords: blunt rigid projectile, metallic plate, perforation, shear plugging, adiabatic shear plugging
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