Numerical investigation of the bodywork effect (K-effect)

Nsiampa, Nestor; Coghe, F.; Dyckmans, G.

doi:10.1051/dymat/2009220

Cited by 7 publications

(9 citation statements)

References 1 publication

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“…First off all, the material description should be modeled accurately to exhibit realistic behavior during penetration. A list of J-C parameters for armor materials is tabulated in Section 2.1 [12,[22][23][24]. Using the parameters found, the stressstrain curves at 1250 s À1 strain rate are visualized in Fig12a.…”

Section: Resultsmentioning

confidence: 99%

“…Using the parameters found, the stressstrain curves at 1250 s À1 strain rate are visualized in Fig12a. The Armox 500T [22,23] and Secure 500 [24] armor steels have the nominal hardness value of 500 BHN and are valuable references to compare with own data since both of them are produced by similar manufacturing methods. It was shown that own armor steel is close to Secure 500.…”

Section: Resultsmentioning

confidence: 99%

“…The material stress flow results at 1000 s À1 strain rate are matched with Skoglund ignoring temperature dependence. Nsiampa [24] has reported J-C parameters for a similar hardness material also. In Table 3, a list of J-C parameters found in literature for 500 HB steels are tabulated.…”

Section: Armor Platesmentioning

confidence: 98%

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

2013

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

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

2013

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“…The vehicle hull is modelled using the belytscho-Tsay shell element formulation with five integration points and it is made of high hardness armour steel of which material properties are specified through Johnson-Cook (J-C) material model 11 allowing for large deformation at high strain rate loading conditions. Table 3 shows the J-C parameters for the high hardness steel provided by Nsiampa 12 . The blast simulation of the armoured vehicle is performed with a runtime of 51480 seconds.…”

Section: Numerical Simulation Of the Fullscale Blast Experimentsmentioning

confidence: 99%

Finite Element and Experimental Analyses of an Armoured Vehicle Subjected to Landmine Blast

Erdik¹,

Uçar²,

Kılıç³

2015

DSJ

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Landmines severely threaten the armoured vehicles. The principal objective is to present a methodology for blast simulations of vehicles subjected to landmine explosions. First, free field blast experiment of 2 kg TNT charge in a steel pot is carried out to validate the blast parameters used in the numerical simulation. Overpressure-time history collected in the free field blast experiment is compared to the numerical simulation results. Numerical simulations are performed in LS-DYNA hydrocode that employs Arbitrary Lagrangian Eulerian formulation enabling a fully coupled interaction between the blast wave, the detonation gases, and the vehicle. Second, the full-scale field test of an armoured vehicle exposed to 6 kg of TNT charge in a steel pot underneath the rear end of the vehicle is conducted. Maximum dynamic deformations measured inside the vehicle are compared to the results calculated in the numerical simulation. Results show that the numerical simulation is in good agreement with the full-scale field test.

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“…[29,30] and the stress-strain curves of Secure 500 alloy derived from the J-C flow stress model parameters reported in Ref. [31] are shown for comparison. The J-C model stress-strain curve of the bullet core is shown in Fig.…”

Section: Materials and Testingmentioning

confidence: 99%

Ballistic behavior of high hardness perforated armor plates against 7.62mm armor piercing projectile

et al. 2014

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a b s t r a c tIn this paper, some of the important defeating mechanisms of the high hardness perforated plates against 7.62 Â 54 armor piercing ammunition were investigated. The experimental and numerical results identified three defeating mechanisms effective on perforated armor plates which are the asymmetric forces deviates the bullet from its incident trajectory, the bullet core fracture and the bullet core nose erosion. The initial tests were performed on the monolithic armor plates of 9 and 20 mm thickness to verify the fidelity of the simulation and material model parameters. The stochastic nature of the ballistic tests on perforated armor plates was analyzed based on the bullet impact zone with respect to holes. Various scenarios including without and with bullet failure models were further investigated to determine the mechanisms of the bullet failure. The agreement between numerical and experimental results had significantly increased with including the bullet failure criterion and the bullet nose erosion threshold into the simulation. As shown in results, good agreement between Ls-Dyna simulations and experimental data was achieved and the defeating mechanism of perforated plates was clearly demonstrated.

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Numerical investigation of the bodywork effect (K-effect)

Cited by 7 publications

References 1 publication

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

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

Finite Element and Experimental Analyses of an Armoured Vehicle Subjected to Landmine Blast

Ballistic behavior of high hardness perforated armor plates against 7.62mm armor piercing projectile

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