Research on work efficiency and energy release model of Al/PTFE mixture under electric ignition

Gun blast data from a large variety of weapons are scaled and presented for both the instantaneous energy release and the constant energy deposition rate models. For both ideal explosion models, similar amounts of data scatter occur for the peak overpressure but the instantaneous energy release model correlated the impulse data significantly better, particularly for the region in front of the gun. Two parameters that characterize gun blast are used in conjunction with the ideal scaling models to improve the data correlation. The gun-emptying parameter works particularly well with the instantaneous energy release model to improve data correlation. In particular, the impulse, especially in the forward direction of the gun, is correlated significantly better using the instantaneous energy release model coupled with the use of the gun-emptying parameter. The use of the Mach disc location parameter improves the correlation only marginally. A predictive model is obtained from the modified instantaneous energy release correlation.

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Energy release model of compaction band propagation

Geophysical Research Letters ◽

10.1029/2005gl023602 ◽

2005 ◽

Vol 32 (16) ◽

Cited By ~ 25

Author(s):

J. W. Rudnicki

Keyword(s):

Energy Release ◽

Compaction Band ◽

Release Model

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A Study on Damage Properties of Explosive Internal-Blast of Concrete

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.598.420 ◽

2012 ◽

Vol 598 ◽

pp. 420-424

Author(s):

Qing Tao Wang ◽

Jue Ding ◽

Meng Kan Ying ◽

Bao Liang Zhang

Keyword(s):

Energy Release ◽

Numerical Study ◽

Damage Effect ◽

Building Structures ◽

Sph Method ◽

Particle Hydrodynamics ◽

Smoothed Particle ◽

Detonation Process ◽

Release Model ◽

Heavy Damage

Blast can cause serious loss of people live and property，and heavy damage on building structures. So, a numerical study on internal-blast-field characteristics and dynamic response of concrete by aluminized explosive was conducted. Moreover, three energy release models of aluminized explosive with combustion effects were compared and analyzed. The numerical study shows that the ignition and growth model is one three-form equation of reaction rate, which can describe unsteady detonation process of non-ideal explosives well. So, in this paper, the energy release model of aluminized explosive based on the Lee-Tarver rate equation was utilized, and an internal-blast dynamic model of concrete was established. The smoothed particle hydrodynamics (SPH) method was adopted to research the explosion field and damage effects of concrete, and provides an important way to evaluate the damage effect of internal-blast of the concrete.

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