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

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dc.contributor.authorLesmana, Denny
dc.contributor.authorArifurrahman, Faizal
dc.contributor.authorHameed, Amer
dc.contributor.authorAppleby-Thomas, Gareth J.
dc.contributor.authorSantosa, Sigit P.
dc.date.accessioned2020-05-20T16:04:50Z
dc.date.available2020-05-20T16:04:50Z
dc.date.issued2020-04-30
dc.description.abstractThe 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.identifier.citationLesmana 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, May 2020, pp.1871-1877en_UK
dc.identifier.issn1738-494X
dc.identifier.urihttps://doi.org/10.1007/s12206-020-0408-9
dc.identifier.urihttp://dspace.lib.cranfield.ac.uk/handle/1826/15455
dc.language.isoenen_UK
dc.publisherSpringer Verlagen_UK
dc.rightsAttribution-NonCommercial 4.0 International*
dc.rights.urihttp://creativecommons.org/licenses/by-nc/4.0/*
dc.subject12.7 mm armour piercingen_UK
dc.subjectArmox Advanceen_UK
dc.subjectGas gunsen_UK
dc.subjectCopper jacketen_UK
dc.subjectReverse ballisticen_UK
dc.subjectHigh strain rateen_UK
dc.titleOn the importance of the bullet jacket during the penetration process: reversed-ballistic experimental and numerical studyen_UK
dc.typeArticleen_UK

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