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Journal of the Korea Institute of Military Science and Technology 2005;8(3):101-110.
Study on Residual Velocity of Steel Sphere Perforating Light Weight Thin Plate
Min-Cheol Song
경량 박판을 관통하는 강구의 잔류속도 연구
송민철
국방과학연구소
Abstract
In this paper, the experiments have been conducted to measure the residual velocity for 3.5g steel ball perforating light weight metal plates of aluminum alloy and magnesium alloy. Non-contact electro-magnetic sensors were used to measure the velocity of steel ball before/after perforating plates. The thicknesses of specimens used were about 2.8mm and 4.8mm. The impact velocities of steel ball were from 662m/s to 3594m/s. With same conditions, numerical analysis using Autodyn 2D has been conducted. The results of numerical analysis corresponded with those of experiments. Also, It is suggested that the difference between the residual velocity of experiment or numerical analysis and that of THOR experimental equation of BRL grew smaller as the impact velocity were increased.
Key Words: perforation experiment, residual velocity, light weight thin plate, THOR equation, numerical analysis


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