MODELING PENETRATION OF BI-ELEMENT METALLIC TARGETS BY HIGH-SPEED PROJECTILES | ||||
| The International Conference on Applied Mechanics and Mechanical Engineering | ||||
| Article 102, Volume 15, 15th International Conference on Applied Mechanics and Mechanical Engineering., May 2012, Page 1-18 PDF (418.45 K) | ||||
| Document Type: Original Article | ||||
| DOI: 10.21608/amme.2012.37260 | ||||
 View on SCiNiTO | ||||
| Authors | ||||
| H. A. Abou-Elela; A. M. Riad; A. I. Fayed; M. A. Shaker | ||||
| Egyptian Armed Forces. | ||||
| Abstract | ||||
| ABSTRACT In this paper, an analytical model is proposed to describe the penetration of a high-speed projectile into a metallic bi-element target, consisting of a finite thickness metallic layer facing a semi-infinite RHA armor. The proposed model identifies two main phases for target penetration; these are: (i) penetration of the front metallic layer and (ii) penetration of backing semi-finite metallic armor. During the target penetration phases, three modes of the projectile front may occur; these are erosion, mushrooming and rigid modes [1, 6]. Main assumptions and governing equations of each target penetration phase for each mode of projectile front are presented. These equations are arranged and compiled into a computer program. The input data to the program are easily determined. The measured penetration depths of depleted uranium (DU) projectiles into semiinfinite RHA armor at different impact velocities of Ref. [4, 5] are compared with the corresponding model predictions to determine the RHA flow stress. In addition, the model predictions are compared with the ballistic measurements of Ref. [4] to determine the flow stress of front metallic layer materials of the bi-element targets. The present model is also used to predict the ballistic efficiencies of the front titanium plates with different thicknesses when each of them is backed by a semi-infinite RHA armor. Moreover, predicted samples for the influence of the projectile impact velocity on the ballistic efficiency are presented and discussed. | ||||
| Keywords | ||||
| Bi-element targets; Titanium; Penetration; Erosion; bi-element metallic targets; semiinfinite targets; impact dynamics; penetration model | ||||
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