Effect of Prestressing Multilayer Steel Armor on Its Impact Resistance to Blunt Rigid Projectiles | ||
| International Conference on Aerospace Sciences and Aviation Technology | ||
| Article 13, Volume 17, AEROSPACE SCIENCES & AVIATION TECHNOLOGY, ASAT - 17 – April 11 - 13, 2017, April 2017, Pages 1-8 PDF (931.79 K) | ||
| Document Type: Original Article | ||
| DOI: 10.21608/asat.2017.22374 | ||
| Author | ||
| S. A. K. Yossif | ||
| Lecturer at Mechanical Design Department - Faculty of Engineering – Materia - Helwan University – Cairo – Egypt. | ||
| Abstract | ||
| This paper investigates numerically the enhancement of impact resistance of multiplayer steel armor to rigid and blunt projectiles. The monolithic armor always possesses higher ballistic resistance than the multilayer one of the same weight and areal density. In this work, the monolithic Weldox 460E steel armor is divided into three layers. The front and rear layers have the same thickness and they are thinner than the middle one. The thicker middle layer is prestressed by applying initial compressive strain. Then, the yield point of the middle layer is raised and the overall impact resistance of the prestressed multilayer armor is increased. The prestressed armor is impacted by a high-speed armor piercing (AP) blunt and rigid projectile. The impact resistance is macroscopically measured as the percentage reduction in the kinetic energy (KE) of the AP projectile. The percentage reductions in KE are calculated for the monolithic armor, equal and different thicknesses three layers armors with and without prestressing their middle layers. According to the presented computations, the maximum reduction in KE corresponds to the different thickness three layers armor having its thicker middle layer been prestressed. | ||
| Keywords | ||
| Impact resistance; multilayer armor; armor piercing projectile prestressing; Weldox steel armor; Numerical simulation; Finite element method | ||
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