Science and Technology of Energetic Materials

Vol.73, No.2 (2012)

Research paper

Velocity of metal disks accelerated by explosions
Tomotaka Homae, Kunihiko Wakabayashi, Tomoharu Matsumura, and Yoshio Nakayama


Explosives accelerate a surrounding layer of metal or other material by their detonation. In this study, stainless steel disks were accelerated by exploding composition C-4, weighing 40g, in determining the flight velocity. The intention here was to identify the relationship between the ratio of the thickness of the disk to diameter (t/d), the standoff distance from the explosive material to the disk, and the flight velocity of the disk. The (t/d) was set to be 0.1, 0.2, 0.5, and 1.0. The same weight disks, being approximately 2.5g, were used. The velocity increased with the cross sectional area of the disk. The velocity is substantially described by the momentum per unit cross section. The velocity decreased with standoff distance in the range from 0 mm to 38mm. The velocity was basically constant within the range of 38mm to 189mm.

> Full text (Open access*)


explosive, fragment, velocity, metal disks, standoff distance

© Copyright 1999-2017 Japan Explosives Society. All right reserved.