A high-throughput drop-weight impact instrument for imaging the initiation and propagation of reactions in energetic materials

Characterizing the handling safety and sensitivity of explosives has been a challenging area of study for over 60 years. Historically one of the most accessible and widely utilized experiments has been the drop-weight impact test, which involves dropping a weight on a small sample sandwiched between...

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Hauptverfasser: Moore, Jeremiah D., Cheng, Roseanne M., Zecevic, Milovan, Holmes, Matthew D., Cawkwell, Marc J., Manner, Virginia W.
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Cheng, Roseanne M.
Zecevic, Milovan
Holmes, Matthew D.
Cawkwell, Marc J.
Manner, Virginia W.
description Characterizing the handling safety and sensitivity of explosives has been a challenging area of study for over 60 years. Historically one of the most accessible and widely utilized experiments has been the drop-weight impact test, which involves dropping a weight on a small sample sandwiched between two anvils. Because this experiment generally only utilizes sound thresholds to determine whether or not a sample reacted, the physical and chemical properties governing sensitivity remain convolved. Better understanding of chemical and material characteristics is needed to give the chemistry and engineering communities a predictive tool to determine the handling sensitivity of explosives prior to pursuing expensive and potentially hazardous synthesis and formulation operations. We are developing a high throughput drop tower instrument capable of imaging the deformation and flow of energetic materials during impact and the resulting thermal ignition and propagation events. This instrument is based on previous designs but has been modified for higher throughput and tailorable modifications in the future. Herein, we present key design features that enable high-speed visible and thermal imaging of explosive initiation by sub-shock impacts, as well as preliminary results in which ignition sites were observed in an erythritol tetranitrate sample.
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source AIP Journals Complete
subjects Chemical properties
Drop towers
Energetic materials
Explosive impact tests
Explosives
Ignition
Sensitivity
Thermal imaging
title A high-throughput drop-weight impact instrument for imaging the initiation and propagation of reactions in energetic materials
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