Penetration characteristics of pyramidal projectile into concrete target

Dong, Heng; Wu, Haijun; Liu, Zihao; Gao, Xudong; Pi, Aiguo; Li, Jinzhu; Huang, Fenglei

doi:10.1016/j.ijimpeng.2020.103583

Cited by 13 publications

(5 citation statements)

References 31 publications

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“…Bless et al [1] investigated the penetration capability of projectiles with noncircular and circular cross-sections, it was concluded that the penetration efficiency of noncircular cross-section projectile is higher at velocity below the critical velocity. Similar conclusion was drawn in [2], the results show that the penetration advantage of triangular projectile decreases with the increase of velocity. However, Du et al [3,4] carried out theoretical and experimental investigation on the triangular and quadrangular cross-section projectiles penetrating semi-infinite targets, and found that with impact velocity higher than 1700m/s, projectiles with noncircular cross-section show better penetration capability.…”

Section: Introductionsupporting

confidence: 86%

“…Further, the Grüneisen state equation is introduced as the yield surface and state equation in Johnson-Cook constitutive model are decoupled. In this study, the projectile is treated as rigid body with the density of 7.85g/cm 3 , the Elastic modulus of 211GPa and the Poisson's ratio of 0.28 [2]. In order to calibrate the simulation model and corresponding parameters, experiments were carried out by a single-stage light gas gun at the impact velocity of 400m/s with an impact angle of 10°.…”

Section: Simulation Model and Experimental Verificationmentioning

confidence: 99%

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Trajectory deflection of noncircular cross-section projectile penetrating into metal targets

Han

et al. 2023

J. Phys.: Conf. Ser.

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To analyze the trajectory deflection of a noncircular cross-section projectile penetrating into multiple metal targets, numerical simulations with different impact velocities, projectile tip height and charge geometry are conducted. The simulation model is established using the finite element software LS-DYNA and verified based on the experiment carried out by a single-stage light gas gun. The results show that the impact velocity significantly affects the trajectory deflection of noncircular cross-section projectile. Although the deflections may be different in direction, the magnitudes exhibit decreasing trends with the increasing impact velocity. Besides, the trajectory varies from downward deflection to upward deflection with the increase of projectile tip height, and changes significantly with the tip height ranging from 0.8mm to 1.1mm. Further, as the geometry profile of projectile remains unchanged, the ones with noncircular charge exhibit better ballistic stability as compared with the circular charge projectile. This is mainly related to the variation in projectile mass instead of the variation in moment of inertia.

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Section: Introductionsupporting

confidence: 86%

Section: Simulation Model and Experimental Verificationmentioning

confidence: 99%

Trajectory deflection of noncircular cross-section projectile penetrating into metal targets

Han

et al. 2023

J. Phys.: Conf. Ser.

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“…Wu et al and Liu et al [18][19][20] carried out a series of penetration experiments of ECSPs penetrating into semi-infinite concrete target in the striking velocity range of 700 m/s to 1000 m/s and analyzed the penetration performance of the ECSP and the damage characteristics of the target. They studied the radial stress distribution along the circumferential direction at the cross-section of projectile nose through numerical simulation, introduced the shape factor of the ECSP to modify the cavity expansion theory, analyzed the variation law of the resistance of the projectile nose, and established the model of the normal penetration depth of the ECSP.…”

Section: Introductionmentioning

confidence: 99%

“…Practically, the penetration depth of the ECSP can be solved by converting the cross-sectional area of the ECSP into the area of an equivalent circle for engineering applications [15,16]. However, due to the asymmetry of the ECSP, the radial stress distribution of the projectile nose and the response characteristics of the target are quite different from those of the CCSP [18][19][20]. The radial stress distribution characteristics of the ECSP nose are contributed to the structural optimization design of the projectile, the stability analysis of the charge and the oblique penetration trajectory of ECSPs.…”

Section: Introductionmentioning

confidence: 99%

Study on the penetration of elliptical cross-section projectiles into concrete targets: theory and experiment

Liu

Zhang

Wei

et al. 2022

Lat. Am. j. solids struct.

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To better understand the penetration mechanism of the elliptical cross-section projectile (ECSP) into semiinfinite concrete target, penetration experiments using three types of ECSPs with different shape ratios (1, 1.25 and 1.61) and with striking velocities ranged from 550 m/s to 1050 m/s were conducted. Penetration depths, penetration trajectory and mass erosion rates of the projectile were obtained after the experiments. The experiment results show that the penetration performance and ballistic stability of the ECSP are equivalent to those of the circular cross-section projectile (CCSP). Based on the theory of complex variable function and conformal transformation, a semi-analytical model which can calculate the cavity boundary stress distribution of elliptical section cavity controlled by the displacement boundary condition was established and the model was validated by comparing the model degenerate solution with Kirsch problem results. Theoretical calculation results show that the radial stress of elliptical section cavity increases progressively from the minor axis to the major axis. In addition, a formula combining with the semi-analytical theoretical model and the local interaction theory was developed. The predicted penetration depths were compared with 30 groups of experiment data with different projectile parameters and striking velocities and coincide quite well with the corresponding experimental data. Finally, the influence of shape ratio and caliberradius-head (CRH) on the penetration performance of projectile and the application prospect of ECSPs on hypersonic weapon platform were studied.

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“…Owing to the flattening of aircraft shapes, noncircular projectiles are also being developed to adapt to the internal space of aircraft. With the emergence of noncircular cross-section projectiles [1][2][3][4], the model for the fragment velocity of a cylindrical projectile is no longer applicable. Therefore, research on noncircular cross-section projectiles is particularly important.…”

Section: Introductionmentioning

confidence: 99%

Preformed Fragment Velocity Distribution of Elliptical Cross-section Projectile

Deng

Yang

et al. 2022

Lat. Am. j. solids struct.

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In the field of warhead design, non-cylindrical warhead, especially elliptical cross-section warhead, has received considerable attention. In this study, the initial velocity and distribution characteristics of the preformed fragments of a columnar projectile with an elliptical cross-section were examined. To obtain the velocity distribution of the fragments in this kind of projectile, three elliptical cross-section projectiles with different geometric sizes were test based on the static detonation tests. Then, the numerical models of the elliptical cross-section projectile have been established and validated according to the experiment results. Besides, two kinds of initiation types were studied by the simulation model, and the results indicate that not only the geometric size but the initiation type do great influences on the fragment velocity distribution in the direction of the axis. An empirical model was proposed based on the fragment two-step acceleration progress, and it was in good accordance with numerical results.

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Penetration characteristics of pyramidal projectile into concrete target

Cited by 13 publications

References 31 publications

Trajectory deflection of noncircular cross-section projectile penetrating into metal targets

Trajectory deflection of noncircular cross-section projectile penetrating into metal targets

Study on the penetration of elliptical cross-section projectiles into concrete targets: theory and experiment

Preformed Fragment Velocity Distribution of Elliptical Cross-section Projectile

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