Shock propagation and blast attenuation through aqueous foams

Panczak, Tim; Krier, Herman; Butler, Paul D.

doi:10.1016/0304-3894(87)85004-5

Cited by 19 publications

(9 citation statements)

References 5 publications

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“…Panczak et al [5] studied the blast wave mitigation of aqueous foams. It was noted that many reflections off the foam/air interface produce a complicated waveform in the aqueous foam, which rapidly decays into the air region.…”

Section: Introductionmentioning

confidence: 99%

Numerical simulation of a novel blast wave mitigation device

Wen

Zhang

et al. 2008

International Journal of Impact Engineering

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This paper proposes a novel blast wave mitigation device, consisting of a piston-cylinder assembly. A shock wave is induced inside the device when it is subject to a blast wave. The shock wave propagates inside the device and is reflected repeatedly. The physical processes within the blast wave mitigation device are simulated numerically. Numerical predictions are in excellent agreement with analytical solutions for special cases of the investigated problem that are available in the literature. The peak pressure on the base of the device caused by the blast wave is studied using a number of design parameters. The numerical simulation shows that, although the transmitted impulse remains practically unchanged, the peak pressure of the blast wave can be reduced by as much as 98%, or even higher, depending on the design parameters chosen. r

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Section: Introductionmentioning

confidence: 99%

Numerical simulation of a novel blast wave mitigation device

Wen

Zhang

et al. 2008

International Journal of Impact Engineering

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“…Solid tamping (removed particles, drilling detail) contains a minor volumetric concentration of air (а1 = 0,01-0,1 share units) and therefore its density is from 1.6 to 2.0 g/cm3 and tamping on a liquid basis at changing the volume of the air concentration (а1) is from 0.05 to 0.95 share units the density of the mixture decreases from 0.92 to 0.06 g/cm3. It was found [8][9] that viscous properties can have a noticeable effect on the laws of the explosive waves spread and on the intensity of their fading with distance, and mechanical air foam can be compressed under the influence of a shock wave with the absorption of its energy and adjustment of the cellular structure [10][11][12][13][14][15][16].…”

Section: Resultsmentioning

confidence: 99%

The Change of the Spatial Parameters of the Destruction of the Rock mass by Borehole Charge with Low-Density Tamping

Katanov

2018

E3S Web Conf.

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Abstract. Explosive destruction of the rock formation is substantiated by several theories developed by well-known scientists. The improvement of quality of preparation of rock mass to excavation, by an excavator without an increase in the value of specific consumption of explosives is important in the present time. Traditionally, to increase the impact time of detonation products on the rock hard tamping was used. The problem is in the rational redistribution of the explosion energy due to the use of a borehole charge, and in particular, in the tamping of low-density, porous materials. The more intensive attenuation of the mass velocity of particles in the material of such tamping in comparison with the mass velocity of the rock mass particles contributes to the well channel compression and increases the impact time of detonation products on the rock mass. As a result of redistribution of energy of detonation products, the specific impulse of explosion increases. The value of the radius of the controlled crushing zone increases by more than 1.6 times. The results of industrial explosions in coal mines have confirmed the theoretical reasoning.

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“…Panczak et al [11] studied the blast wave mitigation of aqueous foams. They concluded that vaporization of the liquid component was detrimental to blast wave mitigation.…”

Section: Introductionmentioning

confidence: 99%

Experimental Investigation of a Novel Blast Wave Mitigation Device

Wen

Zhang

et al. 2009

Shock and Vibration

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Abstract.A novel blast wave mitigation device was investigated experimentally in this paper. The device consists of a pistoncylinder assembly. A shock wave is induced within the cylinder when a blast wave impacts on the piston. The shock wave propagates inside the device and is reflected repeatedly. The shock wave propagation process inside the device lengthens the duration of the force on the base of the device to several orders of magnitude of the duration of the blast wave, while it decreases the maximum pressure over an order of magnitude. Two types of experiments were carried out to study the blast wave mitigation device. The first type of experiments was done with honeycomb structures protected by the blast wave mitigation device. Experimental results show that the device can adequately protect the honeycomb structure. A second type of experiments was done using a Hopkinson bar to measure the pressure transmitted through the blast wave mitigation device. The experimental results agree well with results from a theoretical model.

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Shock propagation and blast attenuation through aqueous foams

Cited by 19 publications

References 5 publications

Numerical simulation of a novel blast wave mitigation device

Numerical simulation of a novel blast wave mitigation device

The Change of the Spatial Parameters of the Destruction of the Rock mass by Borehole Charge with Low-Density Tamping

Experimental Investigation of a Novel Blast Wave Mitigation Device

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