High-speed photography and stress-gauge studies of the impact and penetration of plates by rods

Neil K. Bourne; Lucy C. Forde; John E. Field

doi:10.1117/12.273367

28 May 1997 High-speed photography and stress-gauge studies of the impact and penetration of plates by rods

Neil K. Bourne, Lucy C. Forde, John E. Field

Proceedings Volume 2869, 22nd International Congress on High-Speed Photography and Photonics; (1997) https://doi.org/10.1117/12.273367
Event: 22nd International Congress on High-Speed Photography and Photonics, 1996, Santa Fe, NM, United States

Abstract

There has been much study of the penetration of semi- infinite and finite thickness targets by long rods at normal incidence. The effects of oblique impact have received relatively little attention and techniques of modeling are thus less developed. It was decided to conduct an experimental investigation of the effects of rod penetration at various angles of impact at zero yaw. The rods were mounted in a reverse ballistic configuration so that their response could be quantified through the impact. Scale copper, mild steel and tungsten alloy rods with hemispherical ends were suspended at the end of the barrel of a 50 mm gas gun at the University of Cambridge. The rods were instrumented with embedded manganin piezoresistive stress gauges. Annealed aluminum, duraluminum and rolled homogeneous armor plates of varying thickness and obliquity were fired at the rods at one of two velocities. The impacts were backlit and photographed with an Ultranac FS501 programmable high-speed camera operated in framing mode. The gauges were monitored using a 2 GH s^-1 storage oscilloscope. Rods and plates were recovered after the impact for microstructural examination. Additionally, penetration of borosilicate glass targets was investigated using high-speed photography and a localized Xe flash source and schlieren optics. Additional data was obtained by the use of flash X-ray. Waves and damage were visualized in the glass. High-speed sequences and gauge records are presented showing the mechanisms of penetration and exit seen during impact.

Citation Download Citation

Neil K. Bourne, Lucy C. Forde, and John E. Field "High-speed photography and stress-gauge studies of the impact and penetration of plates by rods", Proc. SPIE 2869, 22nd International Congress on High-Speed Photography and Photonics, (28 May 1997); https://doi.org/10.1117/12.273367

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