| Autor: |
Tasker, Douglas, Skrabacz, Daniel, Campbell, Maria, Spielvogel, Kyle, Morinec, Allen, Tucker, Robert, Houlton, Robert, McLaughlin, Aidan, Cawkwell, M. J., Manner, Virginia W. |
| Předmět: |
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| Zdroj: |
AIP Conference Proceedings; 2024, Vol. 3066 Issue 1, p1-7, 7p |
| Abstrakt: |
The high temperature time-to-explosion experiment developed originally by Wenograd in the late 1950s has been revisited using modern standards and diagnostics. Our new High Explosives Initiation Time (HEIT) experiment heats small, 5 mg, samples of energetic materials contained within thin stainless steel hollow needles to temperatures up to 1673 K, the melting temperature of the steel, in a few 10s of microseconds using a 250 J desktop pulsed power system. Unlike Wenograd's original experiments, we detect the onset of thermal explosion via a high speed camera and optical fibers rather than electrically via the rupture of the needle. The test allows us to reliably obtain time-to-explosion as a function of input temperature, from which effective single step Arrhenius kinetics can be derived at the temperatures relevant to both common accident scenarios and shock initiation. Here, we describe in detail the calibration of the needle temperature as a function of input current and provide preliminary Arrhenius kinetics for the thermal explosion of RDX in the temperature interval 1500 > T > 850 K. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
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