A simple one-dimensional approach to modelling ceramic composite armour defeat

Woodward, R. L.

doi:10.1016/0734-743x(90)90035-t

Cited by 113 publications

(65 citation statements)

References 16 publications

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“…A conservative estimate based on this change in aspect ratio suggests local engineering strains of at least 0. 6. Surprisingly, layers of intact chromium-sulfide appear to persist between the heavily deformed grains.…”

Section: Back Facementioning

confidence: 99%

“…When the shock wave/compression waves from the projectile impact reach the back surface of an unconfined sample, they generate release waves that travel back towards the front surface of the sample. These intersect with release waves emanating from the front surface and edges, causing the ceramic to be put in tension and begin to laterally and radially crack ahead of the projectile, causing the formation of a characteristic fracture conoid [2,[5][6][7]. This precursor damage and comminution reduces the stress exerted on the projectile and thus substantially limits the ballistic resistance of the ceramic.…”

Section: Introductionmentioning

confidence: 99%

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Ballistic Response of Chromium/Chromium-Sulfide Cermets

Loiseau

Nabavi

Capozzi

et al. 2015

J. dynamic behavior mater.

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In the present study, the ballistic response of chromium/chromium-sulfide cermet, a microstructural ceramic-metal composite, was investigated. The chromium/chromium-sulfide cermet was manufactured using self-propagating high-temperature synthesis, a process wherein the material is created under a self-sustaining combustion reaction between the chromium and sulfur. This type of synthesis allows the creation of near-net shape structures and offers the possibility of tuning material properties and material behavior by changing the reactant composition. High-speed ballistic impact (&1460 m/s) of samples with initial molar ratios of Cr:S ranging from 1.15:1 to 4:1 exhibited a transition in response from purely brittle to quasi-ductile when the molar ratio was at and above 3:1. Microscopy of the impacted samples revealed that this ductility was sustained by significant deformation of metal chromium particles supported in the matrix of chromium-sulfide ceramic. Ballistic depth of penetration experiments at &1715 m/s using thin cermet samples facing a polyethylene cylinder showed a weak dependence of residual penetration on molar ratio.

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Section: Back Facementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Ballistic Response of Chromium/Chromium-Sulfide Cermets

Loiseau

Nabavi

Capozzi

et al. 2015

J. dynamic behavior mater.

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“…There are different estimate for this angle. [6,27,28] For example, Woodward [6] considered this angle about 68 (the angle formed in quasi-static state). This is according to different approaches and considering the fact that in high-impact velocities, because of high energy of projectile, the projectile-ceramic interface force is more than the ceramic erosion stress.…”

Section: Ceramic Equationmentioning

confidence: 99%

“…when b is very large), the R t is only a function of c and it can be evaluated as described in [15]: (6) Then, the penetration resistance of the ceramic at the initial impact is defined, and variation of this parameter during penetration process can be determined as follows [21] ( 7) where is the penetration velocity at the end of the first phase, and is the penetration resistance of the ceramic at the initial impact.…”

Section: Erosion Of Projectilementioning

confidence: 99%

“…In Florence's model, [5] a global energy balance is proposed, leading to the derivation of the ballistic speed limit. The Woodward model [6] investigates penetration mechanisms considering the lumped mass approach. This model presents analytical solutions for the calculation of velocity and residual mass of a projectile at any instant of time after impact.…”

Section: Introductionmentioning

confidence: 99%

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Analytical and experimental study of high-velocity impact on ceramic/nanocomposite targets

Shanazari

Liaghat

Feli

et al. 2017

Journal of Composite Materials

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In this paper, an analytical model has been developed for modeling high velocity impact on ceramic/nanocomposite targets. In this model penetration resistance of ceramic is determined based on cavity expansion analysis and variables during perforation of projectile onto ceramic are considered. Also semi-angle of ceramic conoid is modified. This angle depends on impact velocity and changes during perforation process. For modeling the back-up composite laminate, the kinetic and strain energy of yarns and shear plugging have been determined. A failure model based on the energy absorption until failure of laminate composite is used. Ballistic impact tests were performed to validate the analytical predictions. These tests were performed by firing 10 mm steel flat ended projectile onto ceramic/composite target. Front layer is alumina ceramic and composite laminates of back up made of E-glass/epoxy with and without nano zirconia particle of 5 wt%. The effect of nano zirconia dispersion in the matrix for different failure modes is discussed. Experimental results revealed an improvement in the ballistic performance of samples with nano zirconia particle. The analytical predictions of ballistic limit velocity and residual velocity of projectile are found to be in good agreement with the experimental results.

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Transparent Ceramics

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A simple one-dimensional approach to modelling ceramic composite armour defeat

Cited by 113 publications

References 16 publications

Ballistic Response of Chromium/Chromium-Sulfide Cermets

Ballistic Response of Chromium/Chromium-Sulfide Cermets

Analytical and experimental study of high-velocity impact on ceramic/nanocomposite targets

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