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dc.contributor.authorForrestal, Michael J.
dc.contributor.authorBørvik, Tore
dc.contributor.authorWarren, Thomas L.
dc.contributor.authorChen, Wenli
dc.date.accessioned2017-11-08T12:14:13Z
dc.date.available2017-11-08T12:14:13Z
dc.date.created2014-08-21T15:23:53Z
dc.date.issued2014
dc.identifier.citationExperimental mechanics. 2014, 54 (3), 471-481.nb_NO
dc.identifier.issn0014-4851
dc.identifier.urihttp://hdl.handle.net/11250/2464937
dc.description.abstractWe conducted an experimental study to understand the mechanisms and dominant parameters for 7.62 mm APM2 bullets that perforate 6082-T651 aluminum armor plates at oblique impacts. The 7.62-mm-diameter, 10.7 g, APM2 bullet consists of a brass jacket, lead filler, and a 5.25 g, ogive-nose, hard steel core. The brass and lead were stripped from the APM2 bullets by the targets, so we conducted ballistic experiments with both the APM2 bullets and only the hard steel cores. These projectiles were fired from a rifle to striking velocities between 400 and 1,000 m/s into 20-mm-thick plates at normal impact (β = 0o) and at oblique angles of β = 15o, 30o, and 45o. Measured residual and ballistic-limit velocities for the full bullet and the hard core were within a few percent for normal impact and all oblique angles. Thus, we showed that the perforation process was dominated by the hard steel core of the bullet. In addition, we conducted large strain, compression tests on the 6082-T651 plate material for input to perforation equations derived from a cavity-expansion model for the steel core projectiles. Model predictions were shown to be in good agreement with measured ballistic-limit and residual velocity measurements for β = 0o, 15o, and 30o. We also presented a scaling law for the bullet that showed the ballistic-limit velocities were proportional to the square root of the product of plate thickness and a material strength term.nb_NO
dc.language.isoengnb_NO
dc.publisherSpringer Verlagnb_NO
dc.titlePerforation of 6082-T651 Aluminum Plates with 7.62 mm APM2 Bullets at Normal and Oblique Impactsnb_NO
dc.typeJournal articlenb_NO
dc.typePeer reviewednb_NO
dc.description.versionacceptedVersionnb_NO
dc.source.pagenumber471-481nb_NO
dc.source.volume54nb_NO
dc.source.journalExperimental mechanicsnb_NO
dc.source.issue3nb_NO
dc.identifier.doi10.1007/s11340-013-9817-3
dc.identifier.cristin1148492
dc.relation.projectNorges forskningsråd: 174834nb_NO
dc.description.localcode© Springer Verlag. The final publication is available at https://link.springer.com/article/10.1007%2Fs11340-013-9817-3. This is the authors' accepted and refereed manuscript to the article.nb_NO
cristin.unitcode194,64,45,0
cristin.unitnameInstitutt for konstruksjonsteknikk
cristin.ispublishedtrue
cristin.fulltextpostprint
cristin.qualitycode2


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