History of Shock Waves, Explosions and Impact

doi:10.1007/978-3-540-30421-0

Cited by 12 publications

(2 citation statements)

References 33 publications

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“…A shock wave is a type of wave that propagates faster than the local speed of sound in the medium [1]. During the spread, shockwaves produce an abrupt spike in pressure over a very short time period, figure 1 [2,3].…”

Section: Introductionmentioning

confidence: 99%

Fe modeling of shock waves

Syla,

Dalipi,

Aliaj

et al. 2024

IJCESEN

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Among the well-known methods in medicine is the application of mechanical waves, as well as ultrasound and shock wave methods. It is known that the characteristics of mechanical waves are determined by amplitude and frequency. If the frequency of the wave is above 20000Hz, then it cannot be heard by the human ear. These waves are called ultrasounds. The basic principle of ultrasound application in medicine is that different tissues or foreign bodies (eg. stones) reflect ultrasound waves differently. In ultrasonography, reflected ultrasound waves are recorded by transducers and translated into a recorded image. On the other hand, if the mechanical wave propagates through a medium with a speed greater than the speed of sound propagated through that medium, then we have the shock wave. In this case, the waves produce an instantaneous increase in pressure or energy for very short intervals of time. These energetic impulses are usually applied in medicine to break kidney stones or urinary channels stones. The basic principle of the application is to focus the energy impulse of the wave on the places where the stones are found and hit them. During shock, the stones are broken and these can come out through the urinary channels. Such a method is called lithotripsy, while the device is called a lithotripter. In this contribution, we modelled the shock waves according to the FE method, while the simulation was done in the ANSYS application.

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Section: Introductionmentioning

confidence: 99%

Fe modeling of shock waves

Syla,

Dalipi,

Aliaj

et al. 2024

IJCESEN

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“…A shock wave is a compression wave in which the peak pressure exceeds the yield strength and the velocity exceeds the speed of sound in the medium of travel [1][2][3][4][5][6][7][8][9][10][11][12][13][14]. In a reactive medium such as the secondary explosive mixture consisting of 50/50 blend of 1,3,5-trinitroperhydro-1,3,5-triazine (RDX) and 2,4,6-trinitrotoluene (TNT) known as Cyclotol 50/50 [15], a shock wave can initiate the chemically driven detonation reaction and is referred to as a detonation wave [16].…”

Section: Introductionmentioning

confidence: 99%

Evaluating blast wave overpressure from non‐spherical charges using time of arrival from high‐speed video

Johnson

Williams

2023

Propellants Explo Pyrotec

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Scaled distance is used to predict blast wave overpressure surrounding the detonation of a known mass of explosive under the assumption that the charge geometry is spherical. Altering charge geometry from spherical overdrives regions of the blast wave resulting in areas of higher overpressures than predicted by scaled distance calculations. Empirical data can be used to scale the blast wave overpressure to cylindrical charges, but available overpressure data for more complex geometries is not available in published literature. In the present study the time of arrival of the blast wave was measured from high-speed video and the Rankine-Hugoniot relationship used to measure blast wave overpressure for varied explosive geometries. The radial overpressure of prismatic charges with cross-sectional shapes of triangle, rectangle, and 5-point star isotropic were compared to the radially isotropic overpressure distribution produced by a cylindrical explosive charge. The rectangle produced the highest overpressure measuring 3.5 times that of the cylinder while the triangular charge had the greatest presented surface area and was only overdriven 3.0 times. From the high-speed video the fireball of detonation products surrounding the star appears significantly overdriven from the internal angle, but this orientation was underdriven at 2.0 meters. The blast wave overpressure downstream from the outside corners of the rectangular and triangular prismatic charges were similar to that of the cylinder at 1.5 meters but trended higher at increasing distance.

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Shock Waves in Hyperbolic Systems of Nonequilibrium Thermodynamics

Ruggeri

Taniguchi

2019

Mathematics of Planet Earth

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History of Shock Waves, Explosions and Impact

Cited by 12 publications

References 33 publications

Fe modeling of shock waves

Fe modeling of shock waves

Evaluating blast wave overpressure from non‐spherical charges using time of arrival from high‐speed video

Shock Waves in Hyperbolic Systems of Nonequilibrium Thermodynamics

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