An Experimental Study on Ballistic Limit of Aluminum Plate Subjected to Fragment-Simulating Projectile
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TECHNICAL ARTICLE—PEER-REVIEWED
An Experimental Study on Ballistic Limit of Aluminum Plate Subjected to Fragment-Simulating Projectile M. R. Aziz . M. F. Zainol . R. Othman
Submitted: 29 July 2020 / Accepted: 12 September 2020 Ó ASM International 2020
Abstract The ballistic limit of the aluminum plate was investigated in this study. There were two conditions of plate which were single and double plate. The double plates were categorized into two sections which were separated 100 mm to each other. The first category had nothing in between two plates, but for the second category, there was fluid in between plates. Those plates were impacted by the fragment-simulating projectile (FSP) at various velocities. The velocity of the FSP was varied by changing the charge weight inside the bullet’s jacket. The experiment was conducted at Science Technology Research Institute for Defence (STRIDE), Batu Arang, Selangor. As far as the result was concerned, the ballistic limit was observed to be greatly affected by the arrangement of the plate. Keywords Ballistic limit Fragment-simulating projectile High-velocity impact Aluminum plate
M. R. Aziz (&) R. Othman Faculty of Mechanical Engineering, Universiti Teknologi MARA Cawangan Pulau Pinang, 13500 Permatang Pauh, Pulau Pinang, Malaysia e-mail: [email protected]; [email protected] M. F. Zainol Fakulti Teknologi Kejuruteraan Mekanikal dan Pembuatan (FTKMP), Kampus Teknologi, Universiti Teknikal Malaysia Melaka, Hang Tuah Jaya, 76100 Durian Tunggal, Melaka, Malaysia
Introduction Ballistic limit is defined as the velocity that has 50% probability to penetrate a target [1]. Generally, ballistic limit is depending on type of target and projectile. Aluminum is well-known for its ability to absorb energy and has lightweight. These two parameters are key factors in body armor development. Safety personnel required body armor to protect them from the injury which could lead to death. Thus, ballistic limit and design of body armor by using aluminum plate are correlated. There are many types of projectiles employs in the ballistic limit study projectile. Common projectiles are blunt ogival, flat, and conicalnosed projectiles which are made from steel [2–6] as well as tungsten [7]. On top of that, real bullets with difference sizes are used in the experiment too. Among them are 0.410 caliber [8], 0.223 caliber [9], 7.62 mm armor piercing [10–12], 9 mm Luger, and 0.357 Magnum [13]. By using these projectiles, researchers keen to determine the ballistic limit, energy absorption, velocity drop, and residual velocity. As far as ballistic limit was concerned, Ming-ming X. et al. showed interest in composite target which was impacted by a flat and conical projectile. The results were the ballistic limit and specific energy absorption of target which were sensitive to the flat projectile [3]. Furthermore, researchers such as Peng Z. et al. introduced polyureacoated steel plates as target in their study. The plates were coated either on front, back, or both sides. They found that th
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