Fourth Progress Report of Light Armor Program.

Wilkins, Mark L.; Cline, C.F.; Honodel, C.

doi:10.2172/4173151

Cited by 111 publications

(112 citation statements)

References 1 publication

(1 reference statement)

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“…To discover whether ceramics used in some combination with other materials can be used effectively in an armor system, it is important to determine their tensile strengths under impact loading condition. Shock Hugoniot of boron carbide has been investigated by Wilkins (1968), Gust and Royce (1971), McQueen et al (1970), Pavlovskii (1971), and Marsh (1980). Later Kipp and Grady (1989) and Grady (1995) reported shock and release response of two different boron carbides manufactured by Eagle Pitcher and Dow Chemical, respectively.…”

Section: Introductionmentioning

confidence: 99%

Shock Response of Boron Carbide

Dandekar¹

2001

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Boron carbide is of interest because of its potential application in protective systems both for personnel and structures. Therefore it is necessary to determine its mechanical response when subjected to impact loading. The present work was undertaken to determine tensile/spall strength of boron carbide under plane shock wave loading and to analyze all available shock compression data on boron carbide materials obtained from different sources. The principal conclusions are: (1) the tensile/spall strength of boron carbide when shocked between 2 and 15 GPa is 0.35 ± 0.07 GPa, (2) the existing shock compression data indicates that boron carbide tends to suffer a gradual loss of its shear strength as the magnitude of shock stress exceeds its Hugoniot Elastic Limit (HEL), i.e., 15-20 GPa, (3) the underlying reason or reasons for the inferred loss of shear strength under plane shock wave compression remains to be investigated, and (4) a general equation of state for boron carbide in its ambient phase is formulated which can adequately represent its hydrodynamic compression up to a strain of 0.25, i.e., to a maximum stress around 70 GPa.u

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Section: Introductionmentioning

confidence: 99%

Shock Response of Boron Carbide

Dandekar¹

2001

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“…Pre liminary evaluation of casting was re ported in Ref. 6 and is continued in Appendix B of this report.…”

Section: Appendix A: Materials Preparation and Analytical Evaluationmentioning

confidence: 99%

“…6 are also listed in Tables A-3 and A-4 for the reader's convenience. The fabricated density includes contributions from BeO and BeB-impurities and from some porosity.…”

Section: Appendix A: Materials Preparation and Analytical Evaluationmentioning

confidence: 99%

Semiannual Progress Report of the Light-Armor Materials Program.

Landingham¹,

Casey²

1971

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“…One layer is designed to erode the projectile, while the other, softer layer, absorbs the kinetic energy of the projectile by plastic deformation [1]. The first ceramic-metal armour was proposed by Wilkins et al [2]. Many descriptions in the literature indicate the improved efficiency of two-component systems over monolithic metal armours [3][4][5].…”

Section: Introductionmentioning

confidence: 99%

Optimization of two-component armour

Kędzierski¹,

Morka²,

Sławiński³

et al. 2015

Bulletin of the Polish Academy of Sciences Technical Sciences

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Abstract. The paper presents research on optimization of two-layer armour subjected to the normal impact of the 7.62x54 B32 armour piercing (AP) projectile. There were analysed two cases in which alumina Al2O3 was supported by aluminium alloy AA2024-T3 or armour steel Armox 500T. The thicknesses of layers were determined to minimize the panel areal density whilst satisfying the constraint, which was the maximum projectile velocity after panel perforation. The problem was solved through the utilization of LS-DYNA, LS-OPT and HyperMorph engineering software. The axisymmetric model was applied to the calculation in order to provide sufficient discretization. The response of the aluminium alloy, armour steel and projectile material was described with the Johnson-Cook model, while the one of the alumina with the Johnson-Holmquist model. The study resulted in the development of a panel optimization methodology, which allows the layer thicknesses of the panel with minimum areal density to be determined. The optimization process demonstrated that the areal density of the lightest panel is 71.07 and 71.82 kg/m 2 for Al2O3-Armox 500T and Al2O3-AA2024-T3, respectively. The results of optimization process were confirmed during the experimental investigation.

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Fourth Progress Report of Light Armor Program.

Cited by 111 publications

References 1 publication

Shock Response of Boron Carbide

Shock Response of Boron Carbide

Semiannual Progress Report of the Light-Armor Materials Program.

Optimization of two-component armour

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