On the ballistic resistance of multi-layered targets with air gaps

Ben‐Dor, G.; Dubinsky, A.; Elperin, T.

doi:10.1016/s0020-7683(97)00358-2

Cited by 46 publications

(35 citation statements)

References 9 publications

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“…That is single targets are more effective than layered or laminated targets of the same total thickness [15][16][17][18]. The use of thicker backing plate and the appropriate standoff distance of the two plates were further shown to improve the performance of the layered targets [19].…”

Section: Resultsmentioning

confidence: 99%

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: 99%

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

et al. 2011

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“…Equation (6) implies that the ratio δ = v bl /v 0 bl depends on the dimensionless parameter α as well as on the shape of the impactor and the dimensionless thicknesses of the layers (plates and air gaps). In our previous investigation it was found that spacing does not affect ballistic properties of shields against conical impactors [Ben-Dor et al 1998b]. In the next section, using the obtained expression for the BLV we study numerically the effect of spacing on the BLV of the shields for nonconical impactors.…”

Section: The Equation Of Motion Of the Impactor M(dmentioning

confidence: 94%

“…In [Ben-Dor et al 1998b;1998a;1999], we studied analytically the influence of air gaps between the plates on the ballistic limit velocity (BLV) of a multilayered shield. Using the general localized interaction model (LIM).…”

Section: Introductionmentioning

confidence: 99%

Effect of air gaps on the ballistic resistance of ductile shields perforated by nonconical impactors

Ben‐Dor

Dubinsky

Elperin

2006

JOMMS

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we proved that localized interaction model (LIM) for shield-impactor interaction implies independence of the ballistic limit velocity (BLV) of spaced shield on air gaps and their widths for conical striker. In this study, the effect of deviation from a conical shape on ballistic properties of spaced shield is investigated using two-term LIM. It is found that this effect is insignificant and it causes small changes (of the order of few percent) in the magnitude of the BLV and energy absorbed by a shield. These theoretical predictions are in agreement with the available experimental results.

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“…Through many perforation tests it was established that single steel plates were more effective than multi-layered targets, with or without spacing. In the paper by Ben-Dor et al [4] investigation of ballistic performance of layered targets was performed. They found that the width of the air gap between the layers had no effect on the resistance of target for the conical-nosed impactors.…”

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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On the ballistic resistance of multi-layered targets with air gaps

Cited by 46 publications

References 9 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

Effect of air gaps on the ballistic resistance of ductile shields perforated by nonconical impactors

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

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