Shock initiation of the TATB-based explosive PBX-9502 heated to ∼ 76°C

Gustavsen, R. L.; Gehr, Ronald; Bucholtz, Scott; Pacheco, Adam; Bartram, Brian

doi:10.1063/1.4971475

Cited by 15 publications

(6 citation statements)

References 9 publications

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“…Similarly, a hot shot is modeled with the Davis/AWSD combination. Shot 2s-912 [16], is similar to the previously described shots, but the initial velocity of the impactor was 2.522 km/s creating an impact stress of 11.6 GPa on a 130°C sample of 9502. The results are shown in 2 (b) with a 25 µm resolution compared to the experimental velocities.…”

Section: Hot and Cold Shotsmentioning

confidence: 76%

Validation of Reactive Flow Capabilities in PAGOSA

Culp

Aslam

2020

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Several reactive flow modeling capabilities are studied and applied to physics problems of interest in the PAGOSA hydrocode with an emphasis on validation. The Davis equation of state and the Arrhenius shock temperature dependent WSD (AWSD) reactive flow model have been implemented by the author in PAGOSA over the last year. These high-explosive modeling options along with the previously existing HE-JWL equation of state and the SURF/SURFplus reactive flow models are discussed, exercised and compared. Validation of the models analyze numerical results against experimental data from cylinder tests, two-stage gas gun experiments and proton radiography (pRad) experiments. Applications of the modeling options are explored involving both HMX based PBX 9501 and TATB based PBX 9502. The effect of mesh size is considered for prediction of phenomena such as corner turning and dead zones, and the relative code performance of the modeling options is discussed.

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Section: Hot and Cold Shotsmentioning

confidence: 76%

Validation of Reactive Flow Capabilities in PAGOSA

Culp

Aslam

2020

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“…This fact is easily seen in experimental observation of PBX 9502, where the Pop-plot changes quite dramatically with changes to initial temperature. See Figure 1, taken from [7]. If pressure was the appropriate thermodynamic variable driving chemical reaction, then the curves in Figure 1 would all align.…”

Section: Wsdmentioning

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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“…The volume expansion coefficient of the explosives is: where α is the volume fraction of each component, β i is the volume expansion coefficient of each component, and β v is the volume expansion coefficient of the mixed explosives ð � C À 1 Þ. The density of the RDX-based aluminized explosives at different temperatures is calculated according to [6]:…”

Section: Effect Of Temperature On Shock Initiation Of Rdx-based Alumimentioning

confidence: 99%

“…Garcia et al [4] applied initiation tests to RX-55-AA (95 wt % LLM-105, 5 wt % Viton) explosives at 25°C and 150°C and found that the volume expansion of LLM-105 that was caused by the increase of explosives temperature increased the shock sensitivity of the explosives. Gustavsen [5][6][7] completed shock-initiation experiments on PBX-9502 (95 wt % TATB, 5 wt % Kel-F800) by using a gas-gun driven non-magnetic stainless-steel flyer, by measuring the particle velocity inside the explosives at different temperatures and investigated the influence of temperature on shock sensitivity. Chen Lang et al [8][9] proposed a test method for explosive-driven flyer-initiating explosives and achieved uniform explosive heating.…”

Section: Introductionmentioning

confidence: 99%

Effect of Temperature on Shock Initiation of RDX‐Based Aluminized Explosives

Chen

Yang

et al. 2019

Propellants Explo Pyrotec

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An increase in temperature of an explosive will lead shock sensitivity to change, which affects explosive safety. Therefore, a study of the effect of temperature on the shock initiation of explosives is of great significance. We carried out a series of tests on explosive-driven flyer-initiating heated RDX-based aluminized explosives (61 wt % RDX, 30 wt % Al, 9 wt % binder) and the temperature and input shock pressure of the explosives were controlled accurately during the tests. The pressure histories at different depths inside the explosives were measured by using manganin pressure gauges, and the effect of temperature on detonation wave growth was analysed. The ignition and growth reaction model, some parameters of which rely on temperature, was used to simulate the shock-initiation processes.The relationship between the model parameters and the temperature were obtained from the experimental results. The run distance to detonation as a function of the initial input pressure in a temperature range, the Pop plot, and the reaction degree of the explosives were determined. For the RDX-based aluminized explosives, binder softening and the increasing sensitivity of RDX are the two main reasons that change the shock sensitivity. For 25°C-110°C, the shock sensitivity decreases with an increase in temperature, mainly because of binder softening. However, for 110°C-170°C, the shock sensitivity increases with an increase in temperature, which depends on the increasing sensitivity of the RDX. Figure 5. Calculated and measured pressure histories of different temperatures at different depths with 10-mm thick PTFE separator. (a) 42 � C, (b) 100°C, (c) 170°C. Effect of Temperature on Shock Initiation of RDX-Based Aluminized Explosives Propellants Explos. Pyrotech. 2019,

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Shock initiation of the TATB-based explosive PBX-9502 heated to ∼ 76°C

Cited by 15 publications

References 9 publications

Validation of Reactive Flow Capabilities in PAGOSA

Validation of Reactive Flow Capabilities in PAGOSA

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

Effect of Temperature on Shock Initiation of RDX‐Based Aluminized Explosives

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