On the violence of thermal explosion in solid explosives

Chidester, Steven K.; Tarver, Craig M.; Green, Leroy G.; Urtiew, P. A.

doi:10.1016/s0010-2180(97)00071-0

Cited by 40 publications

(27 citation statements)

References 8 publications

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“…Berghout et al found a similar transition to violent reaction at 1,334 psi [11]. Chidester et al noted that confinement played a significant role in cookoff violence and varied confinement in their experiments [46]. However, their experimental program confounded the effects of confinement with other factors.…”

Section: Quantification Of Reaction Violencementioning

confidence: 98%

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Cookoff

Asay

2009

Non-Shock Initiation of Explosives

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Section: Quantification Of Reaction Violencementioning

confidence: 98%

“…The first in the series of large-scale tests was performed by Chidester et al [46]. The test was designed to provide quantitative data on the violence of an explosive subjected solely to a thermal environment.…”

Section: Llnl Large-scale Cookoff Testmentioning

confidence: 99%

Cookoff

Asay

2009

Non-Shock Initiation of Explosives

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“…Radial and axial strains in the vessel wall were also measured, even at the onset of explosion, so as to quantify reaction violence. Chidester 8 , et al carried out largescale annular cookoff (lSAC) tests investigate the symmetry and violence of a cookoff event arising from slow, symmetric heating of a moderately heavily confined annular test assembly filled with polymer bonded explosive. Kaneshige 9 , et al studied the temperature field inside the energetic material, as it approaches ignition, using the Sandia instrumented thermal ignition (SITI) apparatus.…”

Section: Literature Reviewmentioning

confidence: 99%

Experimental and Numerical Investigations of Thermal Ignition of a Phase Changing Energetic Material

Shukla

Deepu

2016

Def. Sc. Jl.

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Fortuitous exposure to high temperatures initiates reaction in energetic materials and possibilities of such event are of great concern in terms of the safe and controlled usage of explosive devices. Experimental and numerical investigations on time to explosion and location of ignition of a phase changing polymer bonded explosive material (80 per cent RDX and 20 per cent binder), contained in a metallic confinement subjected to controlled temperature build-up on its surface, are presented. An experimental setup was developed in which the polymer bonded explosive material filled in a cylindrical confinement was provided with a precise control of surface heating rate. Temperature at various radial locations was monitored till ignition. A computational model for solving two dimensional unsteady heat transfer with phase change and heat generation due to multi-step chemical reaction was developed. This model was implemented using a custom field function in the framework of a finite volume method based standard commercial solver. Numerical study could simulate the transient heat conduction, the melting pattern of the explosive within the charge and also the thermal runaway. Computed values of temperature evolution at various radial locations and the time to ignition were closely agreeing with those measured in experiment. Results are helpful both in predicting the possibility of thermal ignition during accidents as well as for the design of safety systems.

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“…Over the last few decades, there has been considerable research effort on the thermal decomposition and thermal explosion violence of energetic materials at elevated temperatures in different sample geometries and confinement [1][2][3]. Thermal explosion studies on various energetic materials in two-dimensional geometry such as the Scaled-Thermal-Explosion-Experiment (STEX) system [4] and the SandiaInstrumented-Thermal-Ignition (SITI) system have been reported [5].…”

Section: Introductionmentioning

confidence: 99%

Study of thermal sensitivity and thermal explosion violence of energetic materials in the LLNL ODTX system

Hsu¹,

Hust²,

Zhang³

et al. 2014

J. Phys.: Conf. Ser.

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Regulation of the burning parameters for energetic materials based on ammonium nitrate and metal nanopowders and nonmetals V N Popok and A G Korotkikh Lawrence Livermore National Laboratory, Livermore, CA USA e-mail: hsu7@llnl.gov Abstract. Incidents caused by fire and combat operations can heat energetic materials that may lead to thermal explosion and result in structural damage and casualty. Some explosives may thermally explode at fairly low temperatures (< 100 o C) and the violence from thermal explosion may cause significant damage. Thus it is important to understand the response of energetic materials to thermal insults. The One Dimensional Time to Explosion (ODTX) system at the Lawrence Livermore National Laboratory has been used for decades to measure times to explosion, threshold thermal explosion temperature, and determine kinetic parameters of energetic materials. Samples of different configurations (pressed part, powder, paste, and liquid) can be tested in the system. The ODTX testing can also provide useful data for assessing the thermal explosion violence of energetic materials. Recent ODTX experimental data are reported in the paper.

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On the violence of thermal explosion in solid explosives

Cited by 40 publications

References 8 publications

Cookoff

Cookoff

Experimental and Numerical Investigations of Thermal Ignition of a Phase Changing Energetic Material

Study of thermal sensitivity and thermal explosion violence of energetic materials in the LLNL ODTX system

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