Asymmetric material impact: Achieving free surfaces velocities nearly double that of the projectile

Journal Article · Tue May 19 04:00:00 UTC 2015 · Procedia Engineering

DOI: https://doi.org/10.1016/j.proeng.2015.04.003 · OSTI ID:1194066

Aslam, Tariq ^[1]; Dattelbaum, Dana ^[1]; Gustavsen, Richard ^[1]; Scharff, Robert ^[1]; Byers, Mark ^[1]

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1. Los Alamos National Lab. (LANL), Los Alamos, NM (United States)

Hypervelocity impact speeds are often limited by practical considerations in guns and explosive driven systems. In particular, for gas guns (both powder driven and light gas guns), there is the general trend that higher projectile speeds often come at the expense of smaller diameters, and thus less time for examining shock phenomena prior to two dimensional release waves affecting the observed quantities of interest. Similarly, explosive driven systems have their own set of limiting conditions due to limitations in explosive energy and size of devices required as engineering dimensions increase. The focus in this study is to present a methodology of obtaining free surface velocities well in excess of the projectile velocity. The key to this approach is in using a high impedance projectile that impacts a series of progressively lower impedance materials. The free surface velocity (if they were separated) of each of the progressively lower impedance materials would increase for each material. The theory behind this approach, as well as experimental results are presented.

• Research Organization: Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)
• Sponsoring Organization: USDOE
• Grant/Contract Number: AC52-06NA25396
• OSTI ID: 1194066
• Journal Information: Procedia Engineering, Journal Name: Procedia Engineering Journal Issue: C Vol. 103; ISSN 1877-7058
• Publisher: ElsevierCopyright Statement
• Country of Publication: United States
• Language: English