Ballistic resistance of high hardness armor steels against 7.62mm armor piercing ammunition

Kılıç, Namık; Eki̇ci̇, Bülent

doi:10.1016/j.matdes.2012.07.045

Cited by 105 publications

(35 citation statements)

References 17 publications

(36 reference statements)

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“…Assessing the reaction of a material to high velocity impact includes considering the effects of deformation, strain rate and temperature. Therefore, the Johnson-Cook (J-C) elastic-plastic model was adopted for mathematical description, including the rheological properties of materials [44][45][46][47][48].…”

Section: Numerical Analysismentioning

confidence: 99%

Assessment of the Impact Resistance of a Composite Material with EN AW-7075 Matrix Reinforced with α-Al2O3 Particles Using a 7.62 × 39 mm Projectile

et al. 2020

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The paper presents the results of studies on the effects of shooting composite materials produced by pressure infiltration with the EN AW-7075 alloy as a matrix and reinforcement in the form of preforms made of α-Al2O3 particles. Composite materials were made with two reinforcement contents (i.e., 30% and 40% vol. of α-Al2O3 particles). The composites produced in the form of 12 mm thick plates were subjected to impact loads from a 7.62 × 39 FMJ M43 projectile fired from a Kalashnikov. The samples of composites with different contents of strengthening particles were subjected to detailed microscopic examination to determine the mechanism of destruction. The effect of a projectile impact on the microstructure of the material within the perforation holes was identified. There were radial cracks found around the puncture holes and brittle fragmentation of the front surfaces of the specimens. The change in the volume of the reinforcement significantly affected the inlet, puncture and outlet diameters. The observations confirmed that brittle cracking dominated the destruction mechanism and the crack propagation front ran mainly in the matrix material and along the boundaries of the α-Al2O3 particles. In turn, numerical tests were conducted to describe the physical phenomena occurring due to the erosion of a projectile hitting a composite casing. They were performed with the use of the ABAQUS program. Based on constitutive models, the material constants developed from the identification of material properties were modelled and the finite element was generated from homogenization in the form of a representative volume element (RVE). The results of microscopic investigations of the destruction mechanism and numerical investigations were combined. The conducted tests and analyses shed light on the application possibilities of aluminium composites reinforced with Al2O3 particles in the construction of add-on-armour protective structures.

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Section: Numerical Analysismentioning

confidence: 99%

Assessment of the Impact Resistance of a Composite Material with EN AW-7075 Matrix Reinforced with α-Al2O3 Particles Using a 7.62 × 39 mm Projectile

et al. 2020

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“…Furthermore, it is not possible to make correct specimens from the bullet due to machining difficulties. Borvik et al [9], Kilic et al [11] and Buchar et al [29] have reported some JC material constants for hard core projectile made of 1007 tool steel with 800 HV hardness which is designed for 7.62 mm NATO ball. Hardness investigation on the N12E hard steel core gave a value of 720 HV which was considered comparable to the 1007 steel core.…”

Section: Bullet Projectilementioning

confidence: 99%

“…Hardness investigation on the N12E hard steel core gave a value of 720 HV which was considered comparable to the 1007 steel core. Preliminary ballistics simulation studies with Ls-Dyna have shown that Kilic et al [11] and Buchar et al [29] material parameters (see Table 3) result in large plastic deformation on the bullet core after interaction with the armour plate, and the projectile residual velocity is underestimated. Borvik et al [9] has modelled 7.62 AP bullet steel core as a rigid material.…”

Section: Bullet Projectilementioning

confidence: 99%

On the Influence of Fracture Criterion on Perforation of High-Strength Steel Plates Subjected to Armour Piercing Projectile

Tria

Trȩbiński

2015

Archive of Mechanical Engineering

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This paper presents a numerical investigation of fracture criterion influence on perforation of high-strength 30PM steel plates subjected to 7.62×51 mm Armour Piercing (AP) projectile. An evaluation of four ductile fracture models is performed to identify the most suitable fracture criterion. Included in the paper is the Modified Johnson-Cook (MJC) constitutive model coupled separately with one of these fracture criteria: the MJC fracture model, the Cockcroft-Latham (CL), the maximum shear stress and the constant failure strain models. A 3D explicit Lagrangian algorithm that includes both elements and particles, is used in this study to automatically convert distorted elements into meshless particles during the course of the computation. Numerical simulations are examined by comparing with the experimental results. The MJC fracture model formulated in the space of the stress triaxiality and the equivalent plastic strain to fracture were found capable of predicting the realistic fracture patterns and at the same time the correct projectile residual velocities. However, this study has shown that CL one parameter fracture criterion where only one simple material test is required for calibration is found to give good results as the MJC failure criterion. The maximum shear stress fracture criterion fails to capture the shear plugging failure and material fracture properties cannot be fully characterized with the constant fracture strain.

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“…The constitutive Johnson-Cook model (J-C) was used to describe the material of the shield and the projectile. This model correctly represents the behavior of the material under conditions of high rate of deformation in the elastic-plastic range, with the reinforcement of the material and thermal weakening taken into consideration (Hanzell, 2016 andKılıc et al, 2013). In numerical calculations, the following material constants were assumed based on the authors' earlier works (Kurzawa et al, 2017B and (Table 2).…”

Section: Model and Assumptionsmentioning

confidence: 99%

Numerical Analysis of Energy Absorption by Sandwich Panels on the Aramid Fiber Backing

Bocian¹,

Jamroziak²,

Pyka³

et al. 2019

Engineering Mechanics

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The work concerns the analysis of a material solution on an aramid laminate reinforced with additional composite layers loaded with ballistic impact from the 7.62 mm M43 Full Metal Jacket (FMJ). The aim of the study is to identify alternative material systems to the reference 4 mm thick Armox A500T armored steel solution. The research was carried out using the finite element method with the application of the ABAQUS program. The optimal solutions for individual material systems were generated based on numerical analyses, thereby classifying them according to the mass-efficiency criterion. The numerical results obtained were validated in a ballistic experiment on samples made according to the methodology adopted for modeling. The range of absorbed energy and residual energy was determined for material systems based on the assumptions of the Recht-Ipson model.

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Ballistic resistance of high hardness armor steels against 7.62mm armor piercing ammunition

Cited by 105 publications

References 17 publications

Assessment of the Impact Resistance of a Composite Material with EN AW-7075 Matrix Reinforced with α-Al2O3 Particles Using a 7.62 × 39 mm Projectile

Assessment of the Impact Resistance of a Composite Material with EN AW-7075 Matrix Reinforced with α-Al2O3 Particles Using a 7.62 × 39 mm Projectile

On the Influence of Fracture Criterion on Perforation of High-Strength Steel Plates Subjected to Armour Piercing Projectile

Numerical Analysis of Energy Absorption by Sandwich Panels on the Aramid Fiber Backing

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