On the importance of the bullet jacket during the penetration process: Reversed-ballistic experimental and numerical study

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dc.contributor.author Lesmana, Denny
dc.contributor.author Arifurrahman, Faizal
dc.contributor.author Hameed, Amer
dc.contributor.author Appleby-Thomas, Gareth J.
dc.contributor.author Santosa, Sigit P.
dc.date.accessioned 2020-05-20T16:04:50Z
dc.date.available 2020-05-20T16:04:50Z
dc.date.issued 2020-04-30
dc.identifier.citation Lesmana D, Arifurrahman F, Hameed A, et al., (2020) On the importance of the bullet jacket during the penetration process: Reversed-ballistic experimental and numerical study. Journal of Mechanical Science and Technology, Volume 34, Issue 5, 2020, pp.1871-1877 en_UK
dc.identifier.issn 1738-494X
dc.identifier.uri https://doi.org/10.1007/s12206-020-0408-9
dc.identifier.uri http://dspace.lib.cranfield.ac.uk/handle/1826/15455
dc.description.abstract The behaviour of exposed and copper-jacketed 12.7 mm En8 steel cores impacting against 5 and 9 mm Armox Advance plates was investigated to determine the significance of the jacket during the penetration. The target plates were accelerated into stationary projectiles (a reversed-ballistic configuration) and the impact was monitored using a multichannel flash X-ray system to gain insight into the interaction of the core target. Numerical simulations were also carried out to compare result with the experimental testing. Explicit numerical software LS-DYNA was used to model the behaviour of the target and the projectile during the impact collision. Fragments of the core and target plate were collected post-shot for analysis. A similar penetration behaviour was observed for both plates, although the post-shot core was shorter after impacting against the 9 mm plate, consistent with enhanced erosion behaviour. The copper jacket protected the core, resulting in greater surface defeat and dwell compared to the unjacketed core. Numerical studies agreed on the cases of projectile impacting the 5 mm and 9 mm target. However, the target fracture cannot be captured. This could be caused by the input of material data and strain rate parameter modelling in LS-DYNA was limited, while the impact phenomenon was high velocity impact that the material exhibits a highstrain rate effect. Overall, the ductile jacket appeared to serve two functions: (1) Absorbing reflected energy during impact, hence cushioning the impact and thereby preserving the core, and (2) constraining or confining the core. In this study, the steel core design and copper jacket has a more complex geometry compared to the simplified steel core designs often applied in several earlier ballistic studies. The captured flash X-rays revealed significantly less erosion in the jacketed cores, agreeing with the post-impact core length measurements. en_UK
dc.language.iso en en_UK
dc.publisher Springer Verlag en_UK
dc.rights Attribution-NonCommercial 4.0 International *
dc.rights.uri http://creativecommons.org/licenses/by-nc/4.0/ *
dc.subject 12.7 mm armour piercing en_UK
dc.subject Armox Advance en_UK
dc.subject Gas guns en_UK
dc.subject Copper jacket en_UK
dc.subject Reverse ballistic en_UK
dc.subject High strain rate en_UK
dc.title On the importance of the bullet jacket during the penetration process: Reversed-ballistic experimental and numerical study en_UK
dc.type Article en_UK

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