Methodology for experimental verification of steel armour impact modelling

Tria, Djalel Eddine; Trȩbiński, R.

doi:10.1016/j.ijimpeng.2016.10.011

Cited by 21 publications

(12 citation statements)

References 19 publications

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“…The unphysical element erosion algorithm used in the solid FE method leads to an inaccurate simulation of the transmitted deceleration forces of the projectile to the target plates with a subsequently inaccurate prediction of the bullet length and the BFD. This supports the results obtained by Tria et al 59 and Scazzosi et al 18 where unexpected bullet deflection angle and an overestimated bullet impact velocity were obtained. Therefore, these inaccurate simulation results could be avoided by the use of the adaptive solid/SPH method which could be a suitable method for the simulation of laminated or monolithic ceramic-composite body armors.…”

Section: Fe Simulationssupporting

confidence: 92%

“…Therefore, the *DEFINE_ADAPTIVE_SOLID_TO_SPH keyword is used to adaptively transform a Lagrangian solid part to SPH particles, when the Lagrangian solid elements comprising those parts fail. 59 In this study, for each failed element, one SPH particle will be generated. The SPH particles replacing the failed element inherit the mass, kinetic variables, and constitutive properties of the failed element.…”

Section: Fe Simulationsmentioning

confidence: 99%

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Performance evaluation of multilayered ceramic composite armors: New design and advanced predictive method

Tria

Kouadria

Małachowski

et al. 2022

Proceedings of the Institution of Mechanical Engineers, Part L:

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Novel body armors are designed to protect against ballistic threats in the most vulnerable organs within the thorax and abdomen. Decreasing the armor weight without affecting its total integrity after the impact is one of the most challenging tasks. In this study, we combine advanced numerical simulations and experimental tests to investigate the ballistic performance of multilayered armor systems (MAS) consisting of laminated alumina (Al2O3) ceramic plates with multi-curve form and a hybrid composite backing. The ballistic trauma absorption and ceramic fracturing morphology are considered evaluation criteria. The investigation provides enough data on the measured trauma and the results are compared to advanced monolithic ceramics. The ballistic tests showed that bonding three or two ceramic plates with polymeric interlayer decreases considerably the eroded ceramic mass in comparison to monolithic ceramic tiles. Furthermore, the layup of two thin Al2O3 tiles with frontal confinement gives the same trauma-weight index as monolithic silicon carbide and reaction-bonded boron carbide plates. The combination of K129 and KM2 aramid weave fabrics decreases the composite backing weight by 33% and increases its ballistic performance in comparison to homogeneous aramid fabrics. Numerical simulations that involve the use of solid Lagrange and adaptive solid/smooth particles hydrodynamics (SPH) numerical approaches with detailed 3D models of the bullet and the MAS are presented in this work. Based on the statistical analysis, a better prediction of the back face deformation and bullet residual length is obtained by the adaptive solid/SPH method, which is found more suitable for the simulation of multilayered armor impact scenarios.

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Section: Fe Simulationssupporting

confidence: 92%

Section: Fe Simulationsmentioning

confidence: 99%

Performance evaluation of multilayered ceramic composite armors: New design and advanced predictive method

Tria

Kouadria

Małachowski

et al. 2022

Proceedings of the Institution of Mechanical Engineers, Part L:

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“…The yield strength and ultimate tensile strength of the material exceeded the minimal values that were provided in the manufacturer datasheet (Table 2). On the other hand those values were a little bit lower than in the works [40][41][42], in which authors investigated the behavior of ARMSTAL 30PM using a combination of quasi-static and dynamic tests for a wide strain rate range. Determined true stress-strain curves of the ARMSTAL 30PM were used to define the numerical model of the material.…”

mentioning

confidence: 75%

“…Plastic flow of the ARMSTAL 30PM target material (parameters A, B, n) was defined according to the results of material characterization tests described in chapter 2.2.2. Strain rate hardening (parameter C), thermal sensitivity (parameter m), and the manner of failure of the material (value of failure strain ε f = 0.78) were assumed to be similar to the other high-strength steels of 500 HB class and were adopted on the basis of the works [40][41][42][55][56][57], in which authors investigated the behavior of ARMSTAL 30PM and other armored steels with similar mechanical properties (Armox 500T, Ramor 500) using a combination of quasi-static and dynamic tests for a wide range of strain rates.…”

Section: Constitutive Equationsmentioning

confidence: 99%

Experimental and Numerical Study on the PG-7VM Warhead Performance against High-Hardness Armor Steel

et al. 2021

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Analyses presented in the article were carried out in order to characterize the main parameters of the shaped charge jet formed due to detonation of the PG-7VM warhead. As opposed to the previously published studies in which rolled homogeneous armored steel was mainly used as a target, in the current work the warhead penetration capability was determined against more contemporary high-hardness (500 HB) ARMSTAL 30PM steel armor with precisely determined mechanical properties. The research included experimental depth of penetration tests and their numerical reproduction in the LS-Dyna software. Special attention was paid to factors that could perturbate the shaped charge jet formation process and under- or overestimate its penetration capability. For this reason, warheads were X-ray inspected for structural discrepancies (voids or air inclusions in explosive, misalignment between the body, explosive, and liner, or lack of contact between the explosive and the liner) and properties of materials (explosive, targets, and most important warhead components) were analyzed before the experiments. The numerical model of the warhead was defined more accurately than in previously published studies, since it was based on the real grenade dimensions and its technical documentation. Thanks to this, the depth of penetration of the target made of ARMSTAL 30PM armored steel plates by the shaped charge jet formed from the PG-7VM warhead obtained by numerical simulation was consistent with the experimental results and equaled 278 mm and 280 mm, respectively. The difference between the experimental and numerical value was smaller than 1%, which confirms that the developed methodology of modeling allows users to properly reproduce the PG-7VM shaped charge jet formation and target penetration processes. A verified numerical model of the shaped charge jet penetration into a steel target was used to determine depth of penetration in function of stand-off distance for the PG-7VM warhead. A maximum depth of penetration of about 317 mm was obtained for the stand-off distance of 360 mm, which may indicate the potential direction of modernization of warheads.

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“…Çalışmalarının sonucunda yeni bir tasarımla üretilen ve ağırlığın azaltıldığı zırhın mermiyi yeterli ölçüde sönümlediği, enerjisini absorbe edebildiği gözlenmiştir. Tria & Trębiński (2017), kuramsal modelleri deneysel olarak doğrulayarak yeni bir yöntem geliştirmek üzerine çalışmışlardır. Küçük silahlardan çıkan mühimmatın oluşturduğu terminal balistiğini incelemek üzere nümerik algoritmalar kullanmışlardır.…”

Section: şEkil 3 Merminin Zırha çArpma Hızına Bağlı Zırhın Delinme İhtimalinin Grafikunclassified

Seramik Ön Yüzlü Çelik Zırhlarda Balistik Hasar Sonrası Çelik Kısmında Oluşan Deformasyonun İncelenmesi

Kalaycıoğlu

Ongun

2021

Savunma Bilimleri Dergisi

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Barış KALAYCIOĞLU ve Alemdar ONGUN üzerinde gerçekleştirilmiştir. Yapılan analizler sonucunda çelik plakada oluşan sehim eğrileri ve maksimum deformasyon değerleri deney sonuçları ile ayrı ayrı karşılaştırılmıştır. Elde edilen sonuçlara göre tüm yöntemlerde sehim eğrilerinin uyum içinde olduğu, plakada oluşan maksimum deformasyon için analitik sonuçların %15, sayısal sonuçların ise %14 farkla deneysel sonuçlara yakınsadığı gözlemlenmiştir.

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Methodology for experimental verification of steel armour impact modelling

Cited by 21 publications

References 19 publications

Performance evaluation of multilayered ceramic composite armors: New design and advanced predictive method

Performance evaluation of multilayered ceramic composite armors: New design and advanced predictive method

Experimental and Numerical Study on the PG-7VM Warhead Performance against High-Hardness Armor Steel

Seramik Ön Yüzlü Çelik Zırhlarda Balistik Hasar Sonrası Çelik Kısmında Oluşan Deformasyonun İncelenmesi

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