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The Numerical Method as Applied to Impact Resistance Analysis of Ogival Nose Projectiles on 6061-T651 Aluminum Plates

Published online by Cambridge University Press:  16 October 2012

Y.-L. Chen  and
H.-C. Chen
Y.-L. Chen*
Affiliation:
Department of Power Vehicle and Systems Engineering, Chung Cheng Institute of Technology, National Defense University, Taoyuan, Taiwan 33551, R.O.C.
H.-C. Chen
Affiliation:
School of Defense Science, Chung Cheng Institute of Technology, National Defense University, Taoyuan, Taiwan 33551, R.O.C.
*
* Corresponding author ([email protected])
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Abstract

This research takes the resistance formula of spherical cavity expansion theory as its foundation. It establishes a predictive model of the residual velocity, ballistic limit velocity, and penetration depth of ogival nose projectiles striking metal target plates at high speed. They are aimed at 6061-T651 aluminum plates of different thicknesses using the iterative algorithm of the numerical method, thereby investigating the theoretical calculation of the residual velocity, penetration depth, ballistic limit velocity, and changes in resistance of ogival nose projectiles when making a normal impact target. In addition to analyzing the resistance undergone by the projectile nose section, this predictive model also considers the effects of friction resistance of the projectile shank section. In this research, we also used the finite element software LS-DYNA to perform a simulated analysis on the penetration depth of the aluminum plate after normal perforation by ogival nose projectiles. Ballistic test experiments were then performed using 0.30” AP (armor piercing) bullets. Finally, a comparative analysis was performed based on the theoretical model, experiments, and numerical simulation results.

Keywords

Spherical cavity expansion theoryNumerical methodBallistic limit velocityLS–DYNA
Type
Articles
Information
Journal of Mechanics , Volume 28 , Issue 4 , December 2012 , pp. 715 - 726
Copyright
Copyright © The Society of Theoretical and Applied Mechanics, R.O.C. 2012

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