Ignition and growth modeling of detonation reaction zone experiments on single crystals of PETN and HMX

White, Bradley; Tarver, Craig M.

doi:10.1063/1.4971459

Cited by 7 publications

(3 citation statements)

References 14 publications

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“…The three parts are identified in Equation (2), where t is time, 1 is current density, 1 0 is initial density and I, G1, G2, a, b, c, d, e, g, x, y 'and z are empirically derived calibration constants [16]. The I&G EOS is applied in many successful cases on simulating detonation progress of solid explosives under impact [18][19][20].…”

Section: Background and Methodsmentioning

confidence: 99%

“…The three parts are identified in Equation (2), where t is time, ρ is current density, ρ 0 is initial density and I, G1, G2, a, b, c, d, e, g, x, y ‘and z are empirically derived calibration constants [16]. The I&G EOS is applied in many successful cases on simulating detonation progress of solid explosives under impact [18–20].

\vcenter{\openup.5em\halign{$\displaystyle{#}$\cr {{dF}\over{dt}}=\ I{\left[1-F\right]}^{b}{\left[{{\rho }\over{{\rho }_{0}}}-1-a\right]}^{x}+{G}_{1}{[1-F]}^{c}\ {{F}^{d}P}^{y}+\hfill\cr {G}_{2}{[1-F]}^{e}\ {{F}^{g}P}^{z}\hfill\cr}}

\vcenter{\openup.5em\halign{$\displaystyle{#}$\cr \left\{0\char60 F\char60 {F}_{ig\ max}\right\}\ \left\{0\char60 F\char60 {F}_{G1\ max}\right\}\ \left\{{F}_{G2\ max}\char60 F\char60 1\right\}\hfill\cr}}

…”

Section: Background and Methodsmentioning

confidence: 99%

See 1 more Smart Citation

Impact Safety Improvement of High Explosives Through the Use of Internal Cavity Design

Xiao

Thornhill

Arora

et al. 2022

Propellants Explo Pyrotec

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This study offers improved safety design guidelines for high explosives (HE), creating impact insensitive geometries, capitalising on the potential for additive layer manufacturing techniques. There are numerous safety concerns when considering energetic materials and HEs, the primary concern, subject of this work, is the risk of unplanned detonation from impact. There are multiple potential causes for unplanned detonation due to impact; one of which is the impact from a high‐speed foreign object. Despite this substantial risk, the problem has not been publicly addressed by means of adjusting the design of the charge itself. Therefore, investigations into the internal design of the charge were executed, whereby the inclusion of various sized and shaped voids are assessed, to establish their effect upon the reactivity of the HE. Using computational modelling, allows for numerous designs to be assessed and developed, and the impact sensitivity of the charge to be tested across a range of scenarios. The proposed validated computational model enables designs to be optimised in a safe and efficient manner, reducing the number of physical tests required, and thus minimising time, cost and the environmental impact.

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Section: Background and Methodsmentioning

confidence: 99%

\vcenter{\openup.5em\halign{$\displaystyle{#}$\cr {{dF}\over{dt}}=\ I{\left[1-F\right]}^{b}{\left[{{\rho }\over{{\rho }_{0}}}-1-a\right]}^{x}+{G}_{1}{[1-F]}^{c}\ {{F}^{d}P}^{y}+\hfill\cr {G}_{2}{[1-F]}^{e}\ {{F}^{g}P}^{z}\hfill\cr}}

\vcenter{\openup.5em\halign{$\displaystyle{#}$\cr \left\{0\char60 F\char60 {F}_{ig\ max}\right\}\ \left\{0\char60 F\char60 {F}_{G1\ max}\right\}\ \left\{{F}_{G2\ max}\char60 F\char60 1\right\}\hfill\cr}}

…”

Section: Background and Methodsmentioning

confidence: 99%

Impact Safety Improvement of High Explosives Through the Use of Internal Cavity Design

Xiao

Thornhill

Arora

et al. 2022

Propellants Explo Pyrotec

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“…Austin et al [5] described the thermo-elasto-viscoplastic behavior of the β phase HMX by incorporating a Murnaghan EOS into the crystal plasticity model, in which decomposition reaction and crystal melting are considered to reproduce Hugoniot data [45] with pressure larger than 40 GPa. Recently, White and Tarver [75] developed the parameters of Jones-Wilkins-Lee (JWL) EOS for HMX single crystal with mass density 1.905 g cm −3 and of JWL EOS for reaction products.…”

Section: Anisotropic Elasticitymentioning

confidence: 99%

Modeling and numerical investigation of mechanical twinning in β-HMX crystals subjected to shock loading

Zhang¹,

Oskay²

2021

Modelling Simul. Mater. Sci. Eng.

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This manuscript establishes a crystal plasticity finite element (CPFE) model with large volumetric deformation for β-HMX (1,3,5,7-tetranitro-1,3,5,7tetrazocane) energetic crystals with emphasis on the deformation twinning behavior under shock loading conditions. The CPFE model captures the nonlinear response of the monoclinic crystal through the application of large volumetric change under shock condition, dislocation slip at low and high moving speeds and mechanical twinning idealized by the twin volume fraction evolution. The twinning behavior is distinguished from dislocation slip through the decomposition of the plastic velocity gradient in which dislocation slip, twinning and slip in the twinned region are separately considered. Third-order Birch Murnaghan EOS is incorporated in the CPFE framework to describe the volumetric deformation under extreme pressure induced by explosion or impact. The results of the numerical investigations show that the twinning behavior exhibits strong orientation dependency, which becomes more evident at higher loading regime. Particle shape significantly affects the twin concentration. Peak twin volume fraction in HMX polycrystalline with regularized particle shapes is lower compared with mesostructure with realistic particle morphologies.

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Scaling of the detonation product state with reactant kinetic energy

Jackson

2018

Combustion and Flame

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Ignition and growth modeling of detonation reaction zone experiments on single crystals of PETN and HMX

Cited by 7 publications

References 14 publications

Impact Safety Improvement of High Explosives Through the Use of Internal Cavity Design

Impact Safety Improvement of High Explosives Through the Use of Internal Cavity Design

Modeling and numerical investigation of mechanical twinning in β-HMX crystals subjected to shock loading

Scaling of the detonation product state with reactant kinetic energy

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