Title: A Three-stage Model for the Perforation of Moderately Thick Metallic Plates
Abstract: Taking account of fracture of the back surface of target,the finite spherical cavity expansion approximation and the two-stage penetration model were modified to develop a new three-stage perforation model for moderately thick metallic plates struck by a rigid projectile.A new concept called fracture penetration depth was proposed,which refers to the maximum penetration depth before the back face of the plate cracks.Closed-form equations for the fracture penetration depth and equations for the penetration resistance force on the projectile head were derived for a conical-head projectile with a small spherical tip which simulates the truncated nose of real projectiles.Penetration resistance force,residual velocity-penetration depth history,ballistic limit and final residual velocity of the projectile were obtained numerically by solution of the equation for projectile motion with Runge-Kutta method.The predicted results are in good agreement with previously published test data.The present model is applicable to those perforation problems where the length of the projectile head is larger or less than the plate thickness.
Publication Year: 2007
Publication Date: 2007-01-01
Language: en
Type: article
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Cited By Count: 4
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