On the Violence of High Explosive Reactions

Tarver, Craig M.; Chidester, Steven K.

doi:10.1115/1.1845474

Cited by 25 publications

(11 citation statements)

References 25 publications

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“…The refinement is seen both in additional observables and in the ability of models to demonstrate the phenomena observed as well as in the more precise nature of the questions being asked on subsequent experiments and models. Initial experiments on PBX 9501 yielded time to explosion as a function of boundary temperature with the ability to vary temperature, confinement, and void volume [27,28]. These experiments used spherical charges and uniform boundary temperature, making them essentially one-dimensional, thus the name one-dimensional time to explosion (ODTX).…”

Section: Small-scale Instrumented Thermal Ignition Experimentsmentioning

confidence: 99%

Cookoff

Asay

2009

Non-Shock Initiation of Explosives

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Section: Small-scale Instrumented Thermal Ignition Experimentsmentioning

confidence: 99%

Cookoff

Asay

2009

Non-Shock Initiation of Explosives

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“…The problem of thermal decomposition during scenarios such as cook-off are routinely modeled using multi-step kinetics models where intermediate products are tracked and the rates are dependent on temperature. It is a goal to eventually model the impact and shock-induced reactions using the same modeling approach [36]. This option will be explored here using a model proposed in [40].…”

Section: Temperature Based Kineticsmentioning

confidence: 99%

Kinetics Based Reaction Modeling for Heterogeneous Explosives

Clutter¹

2007

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Public reporting burden for this collection of information is estimated to average 1 hour per response, including the time for reviewing instructions, searching existing data sources, gathering and maintaining the data needed, and completing and reviewing this collection of information. SPONSORING / MONITORING AGENCY NAME(S) AND ADDRESS(ES) 10. SPONSOR/MONITOR'S ACRONYM(S)Air Force Research Laboratory AFRL-RW-EG Munitions Directorate AFRL/RWAC SPONSOR/MONITOR'S REPORTEglin AFB, FL 32542-6810 NUMBER(S) AFRL-RW-EG-TR-2007-7130 DISTRIBUTION / AVAILABILITY STATEMENTDISTRIBUTION A: For public release; distribution unlimited. AAC/PA Approval and Clearance # 11-06-07-630, dated 6 November, 2007 SUPPLEMENTARY NOTES ABSTRACTThe mechanical and chemical processes that occur in the explosives found in munitions systems are important to the entire life cycle of the system. Examples of these processes are found in the accidental detonation of weapons while in storage or transport, the premature initiation of a warhead during employment, and the destructive output from the system when functioned as designed. The complete range of possible processes encompasses a wide variety of chemical and mechanical phenomena and depending on the scenario, the dominant phenomenon changes. An essential tool for the design and analysis of these systems is a computational model that can predict a range of scenarios. It is such a tool that is the focus of this proposed effort.

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“…During a slow heating process (slow cook-off), heat is conducted further into the explosive forming a uniform temperature distribution in the energetic material. In a slow cook-off, the point of ignition usually occurs near the center of the device and the explosion is observed to be very violent and may lead to detonation [29,2,32]. It is generally accepted that a slow cook-off leads to a more violent explosion than fast cook-off.…”

Section: Introductionmentioning

confidence: 99%

“…The violence of a thermal explosion is dependent upon numerous variables and conditions including the mechanical and thermal properties of the energetic material, the deflagration behavior, heating rate, and the degree of confinement [29,18]. These variables factor into the reaction rate which occurs after ignition of the energetic material.…”

Section: Introductionmentioning

confidence: 99%

The influence of an applied heat flux on the violence of reaction of an explosive device

Hall

Beckvermit

Wight

et al. 2013

Proceedings of the Conference on Extreme Science and Engineering Discovery Environment: Gateway to Discovery

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It is well known that the violence of slow cook-off explosions can greatly exceed the comparatively mild case burst events typically observed for rapid heating. However, there have been few studies that examine the reaction violence as a function of applied heat flux that explore the dependence on heating geometry and device size. Here we report progress on a study using the Uintah Computation Framework, a high-performance computer model capable of modeling deflagration, material damage, deflagration to detonation transition and detonation for PBX9501 and similar explosives. Our results suggests the existence of a sharp threshold for increased reaction violence with decreasing heat flux. The critical heat flux was seen to increase with increasing device size and decrease with the heating of multiple surfaces, suggesting that the temperature gradient in the heated energetic material plays an important role the violence of reactions.

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On the Violence of High Explosive Reactions

Cited by 25 publications

References 25 publications

Cookoff

Cookoff

Kinetics Based Reaction Modeling for Heterogeneous Explosives

The influence of an applied heat flux on the violence of reaction of an explosive device

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