Petal failure characteristics of a conical projectile penetrating a thin plate at high oblique angle |
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Authors: | Shuang-xi Xu Wei-guo Wu Xiao-bin Li Xiang-shao Kong Yan-ling Huang |
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Institution: | (1) Structural Impact Laboratory (SIMLab), Centre for Research-based Innovation (CRI), Department of Structural Engineering, Norwegian University of Science and Technology, NO-7491 Trondheim, Norway;(2) Norwegian Defence Estates Agency, Research and Development Department, NO-0015 Oslo, Norway;(3) 1805 Newton Pl, NE, Albuquerque, NM 87106, USA;(4) 3804 Shenandoah Pl, NE, Albuquerque, NM 87111, USA |
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Abstract: | In order to determine the impact depth of a conical projectile impacting a thin plate at high oblique angle, the residual
velocity of the projectile after penetrating must be known. Based on the petal failure mode of the conical projectile impacting
the thin plate at high oblique angle, the energy consumption mode of the target was determined. During the perforation process,
the energy consumption of the target was completed by the saucerization, the power work of the petals, the propagation of
radial cracks and petal bending. The energy formula was deduced for each energy dissipation mode and the energy consumed in
the impact process was determined. The residual velocity and the ballistic limit velocity of the projectile were deduced by
energy conservation principle. Comparison of the analytical results of the residual velocity to the numerical results demonstrates
the accuracy and reliability of the analytical formula. |
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