Computational analysis of temperature rises in microstructures of HMX-Estane PBXs

Barua, Ananda; Zhou, Min

doi:10.1007/s00466-012-0803-x

Cited by 41 publications

(9 citation statements)

References 25 publications

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“…Therefore, the element size of 10 lm used in this study is adequate. The representative volume element (RVE) size is chosen based on the work of Liu et al 18 This treatment adequately addresses the RVE size issue with regard to the overall constitutive response of the material. The development of hotspots, inherently microstructurally dependent, can vary from one microstructure to another.…”

Section: Hotspot-based Ignition Criterionmentioning

confidence: 99%

Computational prediction of probabilistic ignition threshold of pressed granular Octahydro-1,3,5,7-tetranitro-1,3,5,7-tetrazocine (HMX) under shock loading

Kim

Miller

Horie

et al. 2016

Journal of Applied Physics

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Section: Hotspot-based Ignition Criterionmentioning

confidence: 99%

Computational prediction of probabilistic ignition threshold of pressed granular Octahydro-1,3,5,7-tetranitro-1,3,5,7-tetrazocine (HMX) under shock loading

Kim

Miller

Horie

et al. 2016

Journal of Applied Physics

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“…It is found that the effect of the method on shape is on the same order as that on grain size distribution. Microstructures generated using particles from digitally scanned real material microstructures have been used by Barua et al 11,[29][30][31] and may be used in the future.…”

Section: A Materialsmentioning

confidence: 99%

“…This analysis uses a recently developed capability based on the cohesive finite element method (CFEM). 11,[29][30][31] The second issue has been detailed in Barua et al 32 and concerns hotspot generation and ignition criteria for the thermal runaway of critical hotspots. The third issue, the primary subject of this paper, is the effect of random fluctuations in the microstructure geometry on the ignition response of PBX.…”

Section: Introductionmentioning

confidence: 99%

Prediction of probabilistic ignition behavior of polymer-bonded explosives from microstructural stochasticity

Barua

Kim

Horie

et al. 2013

Journal of Applied Physics

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Random variations in constituent properties, constituent distribution, microstructural morphology, and loading cause the ignition of explosives to be inherently stochastic. An approach is developed to computationally predict and quantify the stochasticity of the ignition process in polymer-bonded explosives (PBXs) under impact loading. The method, the computational equivalent of carrying out multiple experiments under the same conditions, involves subjecting sets of statistically similar microstructure samples to identical overall loading and characterizing the statistical distribution of the ignition response of the samples. Specific quantities predicted based on basic material properties and microstructure attributes include the critical time to ignition at given load intensity and the critical impact velocity below which no ignition occurs. The analyses carried out focus on the influence of random microstructure geometry variations on the critical time to ignition at given load intensity and the critical impact velocity below which no ignition occurs. Results show that the probability distribution of the time to criticality (t c) follows the Weibull distribution. This probability distribution is quantified as a function of microstructural attributes including grain volume fraction, grain size, specific binder-grain interface area, and the stochastic variations of these attributes. The relations reveal that the specific binder-grain interface area and its stochastic variation have the most influence on the critical time to ignition and the critical impact velocity below which no ignition is observed. For a PBX with 95% octahydro-1,3,5,7-tetranitro-1,3,5,7-tetrazocine content, the computationally predicted minimum impact velocity for ignition is in the range of 54-63 ms À1 depending on microstructure. This range is comparable to values measured experimentally for PBX9501 (53 ms À1 by Chidester et al., "Low amplitude impact testing and analysis of pristine and aged solid high explosives," in Eleventh (International) Symposium on Detonation, ONR (1998), 33300. 60-84 ms À1 by Gruau et al., "Ignition of a confined high explosive under low velocity impact," Int. J. Impact Eng. 36, 537-550 (2009)). V

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“…Various binders have therefore been added to RDX-based explosives to reduce their sensitivity [1][2][3][4][5]. Estane is a widely used hydrocarbon polymer in the explosive industry due to its excellent performance [6][7][8][9][10][11][12]. Plastic bonded explosives (PBXs) that are coated with Estane display many advantages, such as excellent toughness and are shatterproof.…”

Section: Introductionmentioning

confidence: 99%

Preparation of Insensitive RDX by Suspension Spray Technology and Its Characterization

Xiang¹,

Li²,

Zhou³

et al. 2019

Cent. Eur. J. Energ. Mater.

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A new insensitive and high energy explosive based on RDX was prepared by suspension spray technology using Estane 5703 as a binder (e-RDX). Scanning electron microscopy was used to characterize the morphology and particle size of the samples. The composite was analyzed by differential scanning calorimetry and X-ray photoelectron spectroscopy. Its impact sensitivity and detonation velocity were determined. For comparison, raw RDX, refined RDX (r-RDX) and solution spray dried RDX/Estane 5703 (e1-RDX) were also tested using these five methods. The SEM results showed that the e-RDX size was 1-3 μm. e1-RDX exhibited a spherical shape with some defects on the surface. The XPS results indicated that Estane 5703 can be successfully coated onto the surface of e-RDX. Compared to raw RDX, the drop height of r-RDX, e1-RDX and e-RDX was increased, being 16.5 cm, 32.9 cm and 58.4 cm, respectively. The activation energy of e-RDX is lower than that of raw RDX, but a little higher than that of e1-RDX. Compared to raw RDX, the detonation velocity of r-RDX, e1-RDX, w-RDX and e-RDX had decreased, being 110 m•s-1 , 710 m•s-1 , 410 m•s-1 and 210 m•s-1 , respectively.

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Computational analysis of temperature rises in microstructures of HMX-Estane PBXs

Cited by 41 publications

References 25 publications

Computational prediction of probabilistic ignition threshold of pressed granular Octahydro-1,3,5,7-tetranitro-1,3,5,7-tetrazocine (HMX) under shock loading

Computational prediction of probabilistic ignition threshold of pressed granular Octahydro-1,3,5,7-tetranitro-1,3,5,7-tetrazocine (HMX) under shock loading

Prediction of probabilistic ignition behavior of polymer-bonded explosives from microstructural stochasticity

Preparation of Insensitive RDX by Suspension Spray Technology and Its Characterization

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