Theoretical studies for calculating the detonation products and properties of explosives

Du Ming-ran; Wang Xu-guang; Guo Zi-ru; Yan Shi-long

doi:10.11883/1001-1455(2015)04-0449-05

Volume 35 Issue 4

Jun. 2016

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Du Ming-ran, Wang Xu-guang, Guo Zi-ru, Yan Shi-long. Theoretical studies for calculating the detonation products and properties of explosives[J]. Explosion And Shock Waves, 2015, 35(4): 449-453. doi: 10.11883/1001-1455(2015)04-0449-05

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Du Ming-ran, Wang Xu-guang, Guo Zi-ru, Yan Shi-long. Theoretical studies for calculating the detonation products and properties of explosives[J]. Explosion And Shock Waves, 2015, 35(4): 449-453. doi: 10.11883/1001-1455(2015)04-0449-05

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Theoretical studies for calculating the detonation products and properties of explosives

doi: 10.11883/1001-1455(2015)04-0449-05

1.
School of Civil Engineering and Architecture, Anhui University of Science and Technology, Huainan 232001, Anhui, China
2.
Beijing General Research Institute of Mining and Metallurgy, Beijing 100044, China
3.
School of Chemical Engineering, Anhui University of Science and Technology, Huainan 232001, Anhui, China

Received Date: 2013-04-12
Rev Recd Date: 2014-02-27
Publish Date: 2015-08-10

Abstract

Abstract

In order to calculate the detonation products and parameters, Lagrange multiplier and Newton iterative method were used to predict detonation products. The state equation of BKW was used to predict detonation parameters. In a range of pressure from 0 to 600 GPa and temperature from 300 to 15 000 K, diamond was intended as the elemental carbon product. Based on the principle of minimum free energy, the equilibrium compositions of detonation products were calculated by using Newton iterative method, which need not calculate the free energy of each composition. The parameters of the state equation of BKW were modified.α=0.5; β=0.298; θ=6 620; κ=9.50. Using self-made program, the detonation properties at CJ point of PETN, whose density is 1.77 g/cm³, were calculated with the theory in this paper and the equation of Hugoniot. The results show satisfactory agreement with the experimental data, with the error less than 1%. The density of detonation products is also predicted easily. When the density of PETN is 1.77 g/cm³, the density of detonation products is 2.43 g/cm³.
- mechanics of explosion,
- detonation parameters,
- thermodynamic property,
- equation of state,
- Gibbs free energy

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References(13)

References

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