Numerical modelling of non-ideal detonation in ANFO explosives applying Wood-Kirkwood theory coupled with EXPLO5 thermochemical code

Štimac, Barbara; Škrlec, Vinko; Dobrilović, Mario; Sućeska, Muhamed

doi:10.1016/j.dt.2020.09.014

Cited by 24 publications

(12 citation statements)

References 17 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Using the oxygen bomb calorimeter and Hess’ law, − the standard molar enthalpy of formation (Δ f H θ m )was −6044 kJ mol –1 . Meanwhile, we calculated the detonation parameters of ECCs-1 using theoretical methods: D EXPLO5 = 6.6 km s –1 , D K‑J = 6.7 km s –1 , P EXPLO5 = 18.8 GPa, and P K‑J = 18.9 GPa, which are very similar to each other.…”

Section: Resultsmentioning

confidence: 99%

“…In order to determine the morphology and chemical phase of ECCs-1, SEM-EDS mapping was carried out. 25,26 In Figure 4, ECCs-1 appears as a regular square columnar structure, with smooth surfaces and sharp edges and corners that are clearly distinguishable. Partial fractures of the crystals cause cracks to appear on some of the solid surfaces, but this has no effect on its physical and chemical properties.…”

Section: Structure Analysismentioning

confidence: 99%

See 1 more Smart Citation

Preparation of Primary Explosive by Self-assembly of Combustible and Oxidizing Agents under Acid

Wang

Xie

et al. 2023

Inorg. Chem.

View full text Add to dashboard Cite

In order to further explore the effect of ligands on the performance of primary explosives and gain a deeper understanding of the coordination mechanism, we designed furan-2-carbohydrazide (FRCA), a ligand, by using oxygen-containing heterocycles and carbohydrazide. Then, FRCA and Cu(ClO4)2 were used to synthesize coordination compounds [Cu(FRCA)2(H2O)(ClO4)2]·CH3OH (ECCs-1·CH 3 OH) and Cu(FRCA)2(H2O)(ClO4)2 (ECCs-1). The structure of the ECCs-1 was confirmed by single-crystal X-ray diffraction, IR and EA characterization. Further experiments on ECCs-1 show that ECCs-1 has good thermal stability, but is sensitive to mechanical stimuli (impact sensitivity = IS = 8 J, friction sensitivity = FS = 20 N). The predicted value of the detonation parameter is D EXPLO 5 = 6.6 km s–1, P EXPLO 5 = 18.8 GPa, but the ignition test, laser test, and lead plate detonation experiment show that ECCs-1 has excellent detonation performance, which is very worthy of attention.

show abstract

Section: Resultsmentioning

confidence: 99%

Section: Structure Analysismentioning

confidence: 99%

Preparation of Primary Explosive by Self-assembly of Combustible and Oxidizing Agents under Acid

Wang

Xie

et al. 2023

Inorg. Chem.

View full text Add to dashboard Cite

show abstract

“…The density of the formed sample has a significant impact on the sample detonation velocity. The theoretical density of the explosive ink forming sample was calculated to be 1.784 g/cm 3 using Explo5 [31] software. The density of the formed sample was measured to be 1.475 g/cm 3 using a density tester, indicating that the actual density of the formed sample was 82.7 % of the theoretical density.…”

Section: Resultsmentioning

confidence: 99%

Design of TDI modified oil‐in‐water emulsion and its application in explosive ink

Han

Xie²,

Deng

et al. 2023

Propellants Explo Pyrotec

View full text Add to dashboard Cite

In order to solve the short stabilization time of the water‐in‐oil emulsion binder system and the shortcomings of the critical blast size of the explosive ink molding sample, a water‐in‐oil emulsion binder was designed with polyvinyl alcohol (PVA) aqueous solution as the aqueous phase, fluorocarbon resin (FEVE) ethyl acetate solution as the oil phase, and toluene diisocyanate (TDI) added to modify the water‐in‐oil emulsion binder. The hexanitrohexaazaisowurtzitane(CL‐20)based explosive ink was made by incorporating submicron CL‐20 into the binder system, and the print‐formed samples were tested for microscopic morphology, crystallographic analysis, mechanical susceptibility, and detonation transmission performance. The results showed that the explosive ink‘s viscosity was moderate and suitable for direct printing, and the formed sample‘s surface particles were uniformly dispersed and had a honeycomb structure. The crystal form of CL‐20 explosive in the explosive ink did not change, the molded sample‘s impact and frictional sensitivities were 1 J and 32 N lower than those of submicron CL‐20, respectively, and the detonation velocity of the molded sample was 6655 m/s. The critical detonation size and critical detonation thickness were 1×0.0078 mm and 0.1 mm, respectively, and a critical detonation corner turning of 90°–160° could be achieved. The results show that the prepared binder system is stable for a long time, and the explosive ink molding samples have excellent blast transmission performance.

show abstract

“…where λ is the mass fraction of reacted explosive (conversion), k is the rate constant, p is pressure, and c and d are rate constants. We found [25] that k =0.045 μs −1 GPa −1.4 , c =1, and d =1.4 the best describe dependence of detonation velocity of ANFO on inverse charge radius.…”

Section: Description Of Modelmentioning

confidence: 86%

Prediction of Cylinder Wall Velocity Profiles for ANFO Explosives Combining Thermochemical Calculation, Gurney Model, and Hydro‐Code

Sućeska

Serene

Zhang

et al. 2021

Propellants Explo Pyrotec

View full text Add to dashboard Cite

Theoretical prediction of performance indicators of explosives plays an important role in the development of new explosives and explosive formulations. Of particular interest is the possibility to estimate the velocity of metal liner driven by an explosive charge. We present a theoretical model for estimation of metal cylinder wall velocity profiles of non‐ideal ANFO explosives. The model is based on thermochemical calculations using EXPLO5 code, expressing the Gurney energy in terms of JWL equation of state, and using hydro‐code simulation. The Wood‐Kirkwood detonation theory, incorporated in EXPLO5, is applied for calculation of detonation parameters of non‐ideal ANFO explosives. It was found that this approach enables prediction of cylinder wall velocity for ANFO explosives, with the error at V/V0=7 expansion ratio not exceeding 100 m/s.

show abstract

Numerical modelling of non-ideal detonation in ANFO explosives applying Wood-Kirkwood theory coupled with EXPLO5 thermochemical code

Cited by 24 publications

References 17 publications

Preparation of Primary Explosive by Self-assembly of Combustible and Oxidizing Agents under Acid

Preparation of Primary Explosive by Self-assembly of Combustible and Oxidizing Agents under Acid

Design of TDI modified oil‐in‐water emulsion and its application in explosive ink

Prediction of Cylinder Wall Velocity Profiles for ANFO Explosives Combining Thermochemical Calculation, Gurney Model, and Hydro‐Code

Contact Info

Product

Resources

About