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Proceedings Paper

X-Ray Studies On Length Reduction Of Perforating Rods At High Impact Velocities
Author(s): A. J. Stilp; V. Hohler
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Paper Abstract

The perforation mechanism of metal rods through different thick steel plates has been investigated with multi-channel flash radiography at velocities of up to 3.5 km/s. All rods were circular in cross-section with a length to diameter ratio of 10; the masses varied between 1 and 10 grams; the rod-material was steel. The perforation tests were carried out by means of a two-stage light-gas gun. Three stereo X-ray stations with orthogonal aligned tubes have been used. The first X-ray station gives the orientation of the rod-projectile before perforation. The other two stations observe the orientation and the length- and velocity-reduction after the impact. These X-ray pictures give also information about the deformation of the rod, and the shape of the spray-bubble around the rod. The experiments discussed in this paper were designed to check the validity of the hydrodynamic theory of rod penetration. The velocity-loss of the rods is very low for length-reduction up to 80 %, for higher reductions the residual velocity decreases very rapidly. The results verify the existence of a stationary phase and instationary phases at the beginning and the end of the penetration.

Paper Details

Date Published: 14 September 1977
PDF: 13 pages
Proc. SPIE 0097, 12th Intl Congress on High Speed Photography, (14 September 1977); doi: 10.1117/12.955208
Show Author Affiliations
A. J. Stilp, Ernst-Mach-Institut der Fraunhofer -Gesellschaft (Germany)
V. Hohler, Ernst-Mach-Institut der Fraunhofer -Gesellschaft (Germany)


Published in SPIE Proceedings Vol. 0097:
12th Intl Congress on High Speed Photography
Martin C. Richardson, Editor(s)

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