Abstract
The penetration process of rod projectile into concrete target is very complex, and the theoretical analysis is very difficult. In this paper, by using the engineering approximation method, through some reasonable simplification of the rod projectile penetration model, the analytical formulas of the penetration resistance, penetration depth and other important physical quantities are established. Through the calculation of penetration depth, when the sliding friction coefficient is 0.1, the results are in good agreement with the experimental results. The results show that the higher the projectile density and the sharper the shape of the warhead, the stronger the penetration ability.
Highlights
Penetration is widely used in both military and civil fields
The size of m in the actual penetration process should be related to the penetration velocity VZ and the performance of projectile target material. m is usually a piecewise function related to the penetration velocity VZ, which makes it difficult to calculate the penetration depth
In this paper, based on the cavity expansion theory, the analytical expressions of the axial resistance of three kinds of rod projectiles with different shapes are given by simplifying the model, and the analytical expressions of the penetration depth are obtained by Newton's second law
Summary
Penetration is widely used in both military and civil fields It is always the desire of weapon developers to analyze the penetration mechanism and effect of projecttile on concrete in theory. Based on the force analysis of vertical penetration process and Newton's second law, Cheng X.L established the rigid body motion model of warhead, and obtained the variation law of various physical quantities in the process of vertical penetration by using numerical integration method [5]. The engineering approximation method is used to simplify the model of the penetration problem of rod projectile, and the analytical formula of important physical quantities such as penetration resistance and penetration depth is established, and the analysis and verification is carried out by an example
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