Perforation of 12mm thick steel plates by 20mm diameter projectiles with flat, hemispherical and conical noses

Børvik, Tore; Langseth, Magnus; Hopperstad, Odd Sture; Malo, Kjell Arne

doi:10.1016/s0734-743x(01)00034-3

Cited by 308 publications

(172 citation statements)

References 12 publications

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“…As noted in the same figure, the residual velocities approach the residual velocity line at increasingly high impact velocities. Here, the residual velocity line is the asymptotic response to a zero thickness target according to Børvik et al [14]. The projectile velocity differences (V i À V r ) are further noted to reach maximum values at the lowest perforation velocities; thereafter, the differences decrease abruptly ( Fig.…”

Section: Resultsmentioning

confidence: 88%

Experimental investigations on the ballistic impact performances of cold rolled sheet metals

et al. 2011

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a b s t r a c tThis study focuses on the ballistic performances of 1 and 2 mm-thick and 2 Â 1 mm-thick cold rolled sheet metal plates against 9 mm standard NATO projectile. The velocity of the projectile before and after perforation, the diameter of the front face deformation, the depth of the crater and the diameter of the hole were measured. The fracture surfaces of the plates near the ballistic limit were also microscopically analyzed. The highest ballistic limit was found in 2 mm-thick plate (332 m s À1 ) and the lowest in 1 mmthick plate (97 m s À1 ). While, the ballistic limit of 2 Â 1 mm-thick plate decreased to 306 m s À1 . Typical failure mechanism of the projectile was the flattening and mushrooming at relatively low velocities and the separation from the jacket at relatively high velocities. In accord with the ballistic limits, 2 mm-thick target plate exhibited the highest hardness value. Microscopic investigations showed the significant reductions in the grain size of the targets after the test.

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Section: Resultsmentioning

confidence: 88%

Experimental investigations on the ballistic impact performances of cold rolled sheet metals

et al. 2011

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“…In case of thin targets, an opposite dependence was found. In papers [30] and [31] perforation of steel plates by three different projectiles was examined. Both experimental and computational experiments showed that hemispherical and conical shaped impactors gave ballistic limit velocity close to 300 m/s, while for the blunt projectile this parameter was about 185 m/s.…”

Section: Introductionmentioning

confidence: 99%

Numerical investigation on ballistic resistance of aluminium multi-layered panels impacted by improvised projectiles

2017

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This paper presents a numerical study of perforation of the aluminium multi-layered targets impacted by steel projectiles in the shape of a ball, nut and nail. For the construction of the protective panels arc-, rectangular-, V-and U-shaped sheets of metal were considered. During the tests the panel thickness was constant at 160 mm. The panels were composed of 1.5-mm-thick aluminium sheets, and the initial speed of debris was 500 m/s. A comprehensive numerical study indicated the shape of the layer that had superior ballistic resistance and the best strength-to-weight ratio. Computational analyses were also used to investigate the influence of thermal softening and strain rate hardening in the Johnson-Cook constitutive model on the ballistic performance of layered targets. The number of layers required to stop the penetrating objects was compared for the rigid and deformable projectiles. Based on the comparative studies, some guidelines for engineering tasks involving exploration of number of possible technical solutions were proposed.

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“…The failure mode of target struck by a blunt nosed projectile (Børvik et al, 2001;2002;Gupta et al, 2006;Arias et al, 2008;Børvik et al, 2009;Dean et al, 2009), hemispherical projectile (Børvik et al, 2002;Gupta et al, 2006; and ogive nosed projectile (Gupta et al, 2007;2010a;2012) has been investigated.…”

Section: Introductionmentioning

confidence: 99%

“…The effect of the nose shape on the ballistic limit was investigated experimentally as well as numerically by Børvik et al (2002), Gupta et al (2006;, Iqbal et al (2010a). Børvik et al (2002) carried out the numerical and experimental study on the impact response of 12 mm thick weldox 460 E steel targets struck by a blunt, hemispherical and conical nose shape projectile.…”

Section: Introductionmentioning

confidence: 99%

Effect of Periphery Fixity on Ballistic Limit of Thin Aluminum Plate Subjected to Blunt and Ogival Projectile Impact

Tiwari¹,

Iqbal²,

Gupta³

2014

International Journal of Applied Mechanics and Engineering

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Three-dimensional numerical simulations were carried out with the ABAQUS/explicit finite element code to study the influence of target boundary conditions on its ballistic limit. 1mm thick 1100-H12 aluminum target of 255 mm span diameter was hit by 19 mm diameter and 50.8 mm length blunt nosed projectile. The mass of the projectile was kept as 52.5 gm. The boundary condition effects on the ballistic limit were investigated by varying the target periphery boundary condition as fully clamped and partially clamped target (75%, 50% and 25%) subjected to projectile impact. The energy absorption and ballistic limit of the target was found to be significantly affected by the boundary conditions. Some of the finite element analysis results were compared with experimental and numerical results reported in international literature and a good agreement between the two was found.

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Perforation of 12mm thick steel plates by 20mm diameter projectiles with flat, hemispherical and conical noses

Cited by 308 publications

References 12 publications

Experimental investigations on the ballistic impact performances of cold rolled sheet metals

Experimental investigations on the ballistic impact performances of cold rolled sheet metals

Numerical investigation on ballistic resistance of aluminium multi-layered panels impacted by improvised projectiles

Effect of Periphery Fixity on Ballistic Limit of Thin Aluminum Plate Subjected to Blunt and Ogival Projectile Impact

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