Dynamic Characterization and Constitutive Modelling of ARMSTAL 500 Steel

Tria, Djalel Eddine; Trȩbiński, R.

doi:10.5604/20815891.1166973

Cited by 6 publications

(2 citation statements)

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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.…”

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confidence: 76%

“…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%

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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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confidence: 76%