Experiments and simulations of penetration into granite by an aluminum shaped charge

Murphy, Michael J.; Randers-Pehrson, Glenn; Kuklo, R. M.; Rambur, T.A.; Switzer, L. L.; Summers, Mark A.

doi:10.1051/jp4:20030759

Cited by 3 publications

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“…Furthermore, the depth and diameter of the SC jet penetration borehole were predicted based on the modified Bernoulli equation and two-stage cavity expansion theory, respectively. Murphy et al (2000Murphy et al ( , 2003 conducted the SC jet penetration tests into granite and high-strength concrete targets, respectively. Furthermore, by establishing the porous equation of state (EOS) for concrete-like materials, the corresponding numerical simulations were performed with CALE code, a 2D ALE hydrocode developed by Lawrence Livermore National Laboratory.…”

Section: A Review Of Existing Studiesmentioning

confidence: 99%

Numerical simulations of shaped charge jet penetration into concrete-like targets

Feng

Fang

et al. 2017

International Journal of Protective Structures

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Shaped charge jet has been widely applied in the military and energy sources' extraction fields; while the related investigations on the shaped charge jet penetration into concrete-like target are still limited, a series of numerical simulation works are conducted in this article. Holmquist-Johnson-Cook and Johnson-Cook models are used to describe the concrete-like targets and metal liner/casing of the shaped charge, respectively. The whole process including the formation, elongation in the air, and penetration into concretelike target of shaped charge jet is reproduced using the multi-material arbitrary Lagrange-Euler algorithm and fluid-structure interaction method implemented in LS-DYNA. Simultaneously, the striking velocities of the jet (both tip and tail) and the damage of target (diameter and depth of penetration borehole) are derived. The above constitutive models, the corresponding material parameters, and the finite element algorithms are validated by comparing with the available tests' data. The analyses of parametric influences are further performed. It indicates that for the unfragmented shaped charge jet, the penetration depth increases and the average penetration borehole diameter decreases with the standoff distance increasing, respectively; the compressive strength of concrete target has slight influence on the penetration depth of shaped charge jet; the diameter of shaped charge jet penetration borehole with aluminum liner is larger, while that with copper liner has a deeper penetration depth. It can also be found that the influence of explosive type on the penetration performance of shaped charge jet is negligible at small standoff distance, while the explosive LX-14 performs better than explosives Octol, B, and 8701 at larger standoff distance.

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Section: A Review Of Existing Studiesmentioning

confidence: 99%

Numerical simulations of shaped charge jet penetration into concrete-like targets

Feng

Fang

et al. 2017

International Journal of Protective Structures

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“…When the explosive charge detonates, a spherical wave propagates outward from the point of initiation. The liner collapses under the influence of high-detonation pressure and forms a jet where the jet tip velocity may travel in excess of 8 km/s [5][6][7]. This high-speed jet penetrates into concrete targets and forms a passageway for subsequent penetration of a projectile.…”

Section: Introductionmentioning

confidence: 99%

Experimental investigation of penetration performance of shaped charge into concrete targets

Wang

Ning

2008

Acta Mech Sin

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In order to develop a tandem warhead that can effectively destroy concrete targets, this paper explores the penetration performance of shaped charges with different cone angles and liner materials into concrete targets by means of experiments. The penetration process and the destruction mechanism of concrete targets by shaped charges and kinetic energy projectiles are analyzed and compared. Experimental results suggest that both kinetic energetic projectile and shaped charge are capable of destroying concrete targets, but the magnitudes of damage are different. Compared with a kinetic energy projectile, a shaped charge has more significant effect of penetration into the target, and causes very large spalling area. Hence, a shaped charge is quite suitable for first-stage charge of tandem warhead. It is also found that, with the increase of shaped charge liner cone angle, the depth of penetration decreases gradually while the hole diameter becomes larger. Penetration depth with copper liner is larger than of aluminum liner but hole diameter is relatively smaller, and the shaped charge with steel liner is between the above two cases. The shaped charge with a cone angle of 100 • can form a jet projectile charge (JPC). With JPC, a hole with optimum depth and diameter on concrete targets can be formed, which guarantees that the second-stage warhead smoothly penetrates into the hole and explodes at the optimum depth to achieve the desired level of destruction in concrete targets.

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“…For instance, shaped charges with copper liners are generally used against steel armoured targets, 1 whereas shaped charges with aluminium liners, having a lower density, are preferred against concrete targets. 4–6 Moreover, the profile of the cavity formed in the target by different jets exhibits different characteristics. To illustrate, shaped charges with cupper liners generally penetrate deeper into the target, causing smaller diameter holes.…”

Section: Introductionmentioning

confidence: 99%

Simulations on concrete penetration of shaped charges

Yavuz

Yıldırım

2011

Journal of Defense Modeling & Simulation

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In this paper, the effects of the use of various aluminium materials as liner material in shaped charges for the perforation of concrete slabs are examined with numerical simulations. Using AUTODYN-2D software, formation of the shaped charge jets for seven different aluminium materials are modelled first and then these jets are directed to 35 MPa compressive strength concrete slabs. Those analyses are performed for a constant liner thickness which corresponds to 8% of the shaped charge diameter. Furthermore, the effect of standoff on the penetration of concrete slabs is examined by using shaped charges with the same geometry and liner material (7075-T6). The cone angle of the shaped charge is taken as 100°.

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Experiments and simulations of penetration into granite by an aluminum shaped charge

Cited by 3 publications

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Numerical simulations of shaped charge jet penetration into concrete-like targets

Numerical simulations of shaped charge jet penetration into concrete-like targets

Experimental investigation of penetration performance of shaped charge into concrete targets

Simulations on concrete penetration of shaped charges

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