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

Journal Article · Tue May 19 00:00:00 EDT 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, Vol. 103, Issue C; Conference: 2015 Hypervelocity Impact Symposium (HVIS 2015), Boulder, CO (United States), 26-30 Apr 2015; ISSN 1877-7058
• Publisher: Elsevier
• Country of Publication: United States
• Language: English

Related Subjects

42 ENGINEERING
gas gun
free surface velocity
asymmetric material impact