Class 3A Bullet Resistance of Multilayer Bulletproof Panels Made of Fibre Reinforced Concrete and Rubber Sheet
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Abstract
In this research, the impact resistance of multilayer bulletproof concrete panels made of steel Fibre-Reinforced Concrete (FRC) and para-rubber sheets (R) subjected to class 3A bullet (.44 Magnum Semi Jacketed Hollow Point) in accordance with the National Institute of Justice (NIJ) Standard were investigated. The experimental procedure was divided into 2 parts. Part I involved the impact energy absorption test of Para-rubber sheet, Styrofoam sheet and FRC with different thicknesses, and FRC with different types of fibre and volume fractions. Part II, the information obtained from the first part was used in the designing and construction of multilayer bulletproof panels. To check the design validity, the multilayer panels were designed to have different degrees of impact energy absorption by using different configurations, such as material types or thicknesses. The result shows that the energy absorption of each material depends on thickness, fibre volume fraction and fibre types. For multilayer panels, 3-failure modes were observed: 1) Perforation, 2) Penetration with back spalling, and 3) Penetration without back spalling or without damage. In addition, the 3rd failure mode occurred when the energy absorption of multilayer panel was equal to 3172 Joule.
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References
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