Complete EOS for PBX 9502

Menikoff, Ralph

doi:10.2172/1043481

Cited by 19 publications

(15 citation statements)

References 9 publications

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“…EOSs are Shaw tables fit to experimental data for products and Mie-Grüneisen EOS for reactants for both PBX 9501 [10] and PBX 9502 [11]. A porosity model (xRage ramp) can be used to account for thermal expansion on initial density for calibrations at -55, 23, 75 °C.…”

Section: Surf/surfplusmentioning

confidence: 99%

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Verification and Validation of High Explosive Reactive Burn Models Implemented in LANL's EAP and LAP Code Base

Andrews

Aslam

Coleman

et al. 2020

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Section: Surf/surfplusmentioning

confidence: 99%

“…The SURF, SURFplus simulations used Sesame tables constructed for the reactants and products based on a long time effort for modeling high explosive equations of state [11,67,69]. The AWSD simulations used the Davis reactants and products equations of state [15].…”

Section: Simulation Setupmentioning

confidence: 99%

Verification and Validation of High Explosive Reactive Burn Models Implemented in LANL's EAP and LAP Code Base

Andrews

Aslam

Coleman

et al. 2020

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“…Determination of the Hugoniot of the insensitive PBX 9502 explosive (95% TATB and 5% Kel-F 800 plasticizer) in a wide pressure range has shown that the data are divided into two groups [12,13]. At the shock-wave amplitude p less than p CJ , the results correspond to the Hugoniot of the inert composition.…”

Section: Determination Of the Hugoniots Of The Emulsion Matrixmentioning

confidence: 99%

Shock compression of an emulsion matrix at pressures up to 37 GPa

Сильвестров

Yunoshev

Пластинин

et al. 2014

Combust Explos Shock Waves

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This paper presents an experimental study of the shock compression of an emulsion matrix based on an aqueous solution of ammonium and sodium nitrates at pressures up to 37 GPa, which is significantly higher than the calculated detonation pressure. The data obtained were used to determine the parameters of the Hayes equation of state and calculate the shock heating temperature of the matrix. At a pressure of more than 17 GPa, the input pressure profiles shows a rise associated with the chemical transformation of the emulsion.

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“…Hence accurate equations of state are needed for the reactants and products of the PBX. The one we are using is described in (Menikoff 2009).…”

Section: -P6 New Models and Hydrocodes For Shock Wave Processesmentioning

confidence: 99%

Reactive burn models and ignition & growth concept

Menikoff

Shaw

2010

EPJ Web of Conferences

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Abstract. Plastic-bonded explosives are heterogeneous materials. Experimentally, shock initiation is sensitive to small amounts of porosity, due to the formation of hot spots (small localized regions of high temperature). This leads to the Ignition & Growth concept, introduced by Lee and Tarver in 1980, as the basis for reactive burn models. A homogenized burn rate needs to account for three meso-scale physical effects: (i) the density of active hot spots or burn centers; (ii) the growth of the burn fronts triggered by the burn centers; (iii) a geometric factor that accounts for the overlap of deflagration wavelets from adjacent burn centers. These effects can be combined and the burn model defined by specifying the reaction progress variable λ = g(s) as a function of a dimensionless reaction length s(t) = r bc / bc , rather than by specifying an explicit burn rate. The length−1/3 is the average distance between burn centers, where N bc is the number density of burn centers activated by the lead shock. The reaction length r bc (t) = t 0 D(P(t ))dt is the distance the burn front propagates from a single burn center, where D(P) is the deflagration speed as a function of the local pressure and t is the time since the shock arrival. A key implementation issue is how to determine the lead shock strength in conjunction with a shock capturing scheme. We have developed a robust algorithm for this purpose based on the Hugoniot jump condition for the energy. The algorithm utilizes the time dependence of density, pressure and energy within each cell. The method is independent of the numerical dissipation used for shock capturing. It is local and can be used in one or more space dimensions. The burn model has a small number of parameters which can be calibrated to fit velocity gauge data from shock initiation experiments.

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Complete EOS for PBX 9502

Cited by 19 publications

References 9 publications

Verification and Validation of High Explosive Reactive Burn Models Implemented in LANL's EAP and LAP Code Base

Verification and Validation of High Explosive Reactive Burn Models Implemented in LANL's EAP and LAP Code Base

Shock compression of an emulsion matrix at pressures up to 37 GPa

Reactive burn models and ignition & growth concept

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