A comparison of penetration mechanics of metal and fiber/resin composite targets against ballistic impact

Dimeski, Dimko and Srebrenkoska, Vineta (2014) A comparison of penetration mechanics of metal and fiber/resin composite targets against ballistic impact. In: VIth International Metallurgical Congress, 29 May-01June 2014, Ohrid, Macedonia.

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Abstract

In metals the penetration process, due to high-velocity impact, can be represented by four phase: transient, primary penetration, secondary penetration and recovery. The transient phase is characterized by a very short pressure spike and occurs when the projectile first contacts the target surface. The primary penetration phase is described as the period during which the projectile acts as a contributing force, imparting its kinetic energy to the target in a hydrodynamic manner. The secondary phase or cavitation begins after the projectile is completely deformed. Recovery phase refers to the period during which the crater recovers or contracts. Contrary to the metals, the composites, which are regarded as highly anisotropic materials, fail very differently. Possible energy absorbing mechanism are: cone formation on the back face of the target, deformation and fracture of the yarns, delamination, matrix cracking, shear plugging and friction between the projectile and the target. In the current paper we compare the penetration mechanics of metal and composite targets and stress the advantages/disadvantages of each of these two classes of ballistic protective materials. Key words: ballistic mechanics, fiber composites, metal armor

Item Type: Conference or Workshop Item (Poster)
Subjects: Engineering and Technology > Materials engineering
Divisions: Faculty of Technology
Depositing User: Dimko Dimeski
Date Deposited: 11 Jun 2014 11:33
Last Modified: 11 Jun 2014 11:33
URI: http://eprints.ugd.edu.mk/id/eprint/10052

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