Penetration of a woven CFRP laminate by a high velocity steel sphere impacting at velocities of up to 1875m/s

Hazell, Paul J.; Cowie, A.; Kister, Guillaume; Stennett, C.; Cooper, G.

doi:10.1016/j.ijimpeng.2008.12.001

Cited by 44 publications

(26 citation statements)

References 17 publications

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“…At low impact velocities the term which represents the ratio between crushing energy dissipation and the projectile kinetic energy ðR ck Þ is the most important, while at high velocities the mass ratio term ðR m Þ is the most important. This analysis allows to state that at low impact velocities the kinetic projectile energy is mainly absorbed by laminate crushing, while at high velocities the linear momen tum transfer drives the process [34].…”

Section: Equation Resolutionmentioning

confidence: 99%

Analytical modelling of high velocity impacts of cylindrical projectiles on carbon/epoxy laminates

López-Puente

Varas

Loya

et al. 2009

Composites Part A: Applied Science and Manufacturing

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a b s t r a c tIn this work an analytical model has been developed in order to predict the residual velocity of a cylin drical steel projectile, after impacting into a woven carbon/epoxy thin laminate. The model is based in an energy balance, in which the kinetic projectile energy is absorbed by the laminate through three different mechanisms: linear momentum transfer, fiber failure and laminate crushing. This last mechanism needs the quantification of the through thickness compressive strength, which has been evaluated by means of quasi static punch tests. Finally, high velocity impact tests have been accomplished in a wide range of velocities, to validate the model.

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Section: Equation Resolutionmentioning

confidence: 99%

Analytical modelling of high velocity impacts of cylindrical projectiles on carbon/epoxy laminates

López-Puente

Varas

Loya

et al. 2009

Composites Part A: Applied Science and Manufacturing

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“…The residual velocity rapidly reduces with the increasing velocity of the projectile. The third regime is characterized by the perforation mechanism of composites being dominated by shaped plug formation, causing no plug but compression/shear failure in the target [43].…”

Section: Impact Test Resultsmentioning

confidence: 99%

“…Fibers of the front and back surfaces were pull out, which is a characteristic of tensile type of failure [43]. The carbon matrix is brittle, and consequently brittle failure had occurred during the penetration of the projectiles.…”

Section: Impact Test Resultsmentioning

confidence: 99%

High velocity impact tests on high temperature carbon-carbon composites

Xie

Meng

Ding

et al. 2016

Composites Part B: Engineering

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General rightsThis document is made available in accordance with publisher policies. Please cite only the published version using the reference above. AbstractThis paper describes the effect of high velocity impact on the structural integrity of advanced carbon-carbon (C/C) composites for high temperature applications. Impact tests have been performed on heated C/C composite samples at high temperature to establish correlations between the mechanical performances of the composites and different impact factors. Two tensile tests were also performed to investigate the residual strength of the high temperature C/C structures with the impact damage. In this work we present two new equations to predict the dimensionless damage areas of the C/C impacted at elevated temperatures. The impact resistance of the C/C composites is affected by the diameter of the projectile, the temperature and thickness of the C/C laminates and -more importantly -by the impact velocity. The residual strength of the damaged C/C composites increased by 47% after heating the samples from 25°C to 1206°C.

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“…Ballistic experiments were performed on a series of cold-pressed alumina powder compacts using a 30-mm bore, 5-m barrel, single-stage gas-gun [19]. This was used to launch saboted spray Al 2 O 3 powders.…”

Section: Methodsmentioning

confidence: 99%

On the effects of powder morphology on the post-comminution ballistic strength of ceramics

Appleby-Thomas

Wood

Hameed

et al. 2017

International Journal of Impact Engineering

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In this paper in order to try and elucidate the effects of particle morphology on ballistic response of comminuted systems, a series of experiments were carried out via the use of powder compacts with differing initial particle morphologies. This approach provided a route to readily manufacture comminuted armour analogues with significantly different microstructural compositions. In this study pre-formed `fragmented-ceramic' analogues were cold-pressed using plasma-spray alumina powders with two differing initial morphologies (angular and spherical). These compacts were then impacted using 7.62-mm FFV AP (Förenade Fabriksverken Armour Piercing) rounds with the subsequent depth-of-penetration of the impacting projectile into backing Al 6082 blocks used to provide a measure of pressed ceramic ballistic response. When material areal density was accounted for via differing ballistic efficiency calculations a strong indication of particle morphology influence on postimpact ceramic properties was apparent. These results were reinforced by a separate small series of plate-impact experiments, whose results indicated that powder morphology had a strong influence on the nature of compact collapse.which have shown that this comminuted materialon further compactionthen provides a residual resisting strength with respect to penetration [7,8,9]. The concept of ballistic strength discussed in this paper is essentially a measure of the ability of armour to resist penetration following an impact event. A number of different approachesboth experimental and computationalhave been adopted to investigate such material response, with the ultimate aim of allowing improved armour (or munition) development from the resultant insight into armour behaviour. Holmquist et al. [10] undertook a series of experiments to investigate the defeat mechanismsfor SiC tiles impacted in a reverse ballistics configuration by 1-mm diameter Au long rods.By monitoring a variety of impact events via a flash X-ray system the authors were able to discern both the onset of the dwell-penetration transition and the nature of subsequent penetration. Interestingly, a non-linear penetration velocity was discerned in all cases, in line with computational simulations. This behaviour was attributed to the multi-stage nature of the ceramic failurewith impacted material being comminuted before penetration occurred.However, in this study the nature of this comminuted materialand its precise contribution to ballistic resistancewere not discussedsomething which will be investigated here.A recent study by Horsfall et al. [11] however, focused to a greater extent on the contribution of fractured materials. In this study Sintox ® FA tiles comprising 95% alumina were explosively comminuted within a confining steel frame. An in-situ Al 7018-T6 witness plate located directly beneath the tile allowed subsequent depth-of-penetration (DOP) testing [1,12, 13,14] without further disturbance of the comminuted material. Further, as a comparison, 80 m pure alumina powder was pressed in...

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Penetration of a woven CFRP laminate by a high velocity steel sphere impacting at velocities of up to 1875m/s

Cited by 44 publications

References 17 publications

Analytical modelling of high velocity impacts of cylindrical projectiles on carbon/epoxy laminates

Analytical modelling of high velocity impacts of cylindrical projectiles on carbon/epoxy laminates

High velocity impact tests on high temperature carbon-carbon composites

On the effects of powder morphology on the post-comminution ballistic strength of ceramics

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