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Protection
performance of double-layered metal shields against
projectile impact
Xiaoqing Teng, Sumita Dey, Tore Børvik and Tomasz Wierzbicki |
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Vol. 2 (2007), No. 7, 1309–1329
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Abstract |
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This paper critically evaluates the protection performance of double-layered shields against projectile impact at the subordnance velocity using finite element methods. Four types of projectiles of different weight and nose shape are considered, representing various fragments generated from Improvised Explosive Devices (IEDs). It is found that the double-layer configuration is able to improve the ballistic resistance by – for the flat-nose projectile, compared to the monolithic plate of the same weight. The upgrade is due to the transition of the failure mode from less energy dissipating shear plugging to more energy dissipating tensile tearing. Under impact by the conical-nose projectile, the double-layered target is almost as capable as the monolithic plate. The present research helps resolve the long outstanding issue of the protection effectiveness of the double-layer configuration. |
Keywords
double layer, projectile, perforation, fragments
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Milestones
Received: 2 January 2007
Accepted: 12 March 2007
Published: 1 September 2007
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Authors |
| Xiaoqing Teng | |
| Impact and Crashworthiness Lab Massachusetts Institute of Technology 77 Massachusetts Avenue, Room 5-218 Cambridge, MA 02139 United States |
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| Sumita Dey | |
| Structural Impact Laboratory Norwegian University of Science and Technology Rich. Birkelands vei 1A, NO-7491 Trondheim Norway |
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| Tore Børvik | |
| Structural Impact Laboratory Norwegian University of Science and Technology Rich. Birkelands vei 1A, NO-7491 Trondheim Norway |
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| Tomasz Wierzbicki | |
| Impact and Crashworthiness Lab Massachusetts Institute of Technology 77 Mass Avenue, Room 5-218 Cambridge, MA 02139 United States |
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