Electrically-launched mm-sized hypervelocity projectiles

Uhlig, W. Casey; Berning, Paul R.; Bartkowski, Peter T.; Coppinger, Matthew J.

doi:10.1016/j.ijimpeng.2019.103441

Cited by 6 publications

(2 citation statements)

References 5 publications

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“…The US Army Combat Capabilities Development Command (DEVCOM) Army Research Laboratory (ARL) recently developed and refined a method of delivering millimeter-sized pellets at hypervelocity for investigations in a laboratory setting. [1][2][3][4][5] Such technologies permit the rapid generation of a wealth of information concerning high-velocity material interactions. One approach to potentially achieve yet higher velocities involves leveraging a material analysis technique known as dynamic tensile extrusion (DTE).…”

Section: Introductionmentioning

confidence: 99%

A Parametric Analysis of Dynamic Tensile Extrusion Using ALEGRA

Coppinger

2023

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Section: Introductionmentioning

confidence: 99%

A Parametric Analysis of Dynamic Tensile Extrusion Using ALEGRA

Coppinger

2023

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“…These include single-and multiple-stage light gas guns, powder or even electromagnetic guns [15,16] capable of launching heavy projectiles to similar velocities as explosives, however at significantly higher cost. Low-mass projectiles, or foils, may also be accelerated to high velocities by expanding plasma generated using various sources (electricity, laser, radiation) [17]. Flight paths are in a mm range and methodologies with high spatial and temporal resolution capturing acceleration to km • s −1 at such short distances are required.…”

Section: Introductionmentioning

confidence: 99%

Simple flash screens for shaped charge jet and flyer velocity measurements

Künzel¹,

Kučera²,

Kvapil³

et al. 2020

Meas. Sci. Technol.

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The paper describes a novel technique for measuring the velocity of fast flying objects. The technique utilises a series of simple single-use screens which are placed along the expected flight path. The projectile interaction with the screen generates a flash of light which is captured by an optical fibre connected to the light detecting device. The velocities are calculated from the signal arrival times and screen positions. The flash screens were tested using copper shaped charge jets and flyer discs accelerated by explosive charges made of sensitised nitromethane. In addition to the simple time of arrival measurement with VOD-815, the light signals were recorded using an OPTIMEX-64 light analyser which enabled checking their intensity and reproducibility. Some of the experiments were also carried out using a UHSi 12/24 high-speed camera. The flyer plate velocities measured were compared with empirical calculations from a Gurney model.

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