Development of dynamic high-pressure techniques in Russia

Al’tshuler, L. V.; Trunin, R. F.; Urlin, V. D.; Фортов, В. Е.; Funtikov, A. I.

doi:10.3367/ufnr.0169.199903g.0323

Cited by 30 publications

(13 citation statements)

References 51 publications

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“…A visual analysis of the sieved material (see Figs. [2][3][4] showed that the fraction of the fine fraction increased with increasing impact velocity v 0 . …”

Section: Results and Tentative Analysis Of The Experimentsmentioning

confidence: 99%

“…Between the two shock fronts, the materials of the projectile and target are compressed to the same pressure, and both compressed regions move together at the same particle velocity. The state between the two fronts can be determined from the Hugoniot equations for each shock front separately, using the corresponding equation of state [1][2][3][4][5] for each material and the additional condition of equal velocities and pressures at the interface. If a projectile moves at a velocity v 0 (in a coordinate system in which the target is at rest), so that u p is the particle velocity behind the shock wave in a coordinate system in which the projectile is at rest, the particle velocity behind the shock wave in the target is found from the relation…”

Section: Calculations Of Postshock Parameters In the Filled Epoxy Resmentioning

confidence: 99%

“…The response of materials to high pressures under high-velocity impact conditions is of significance in studies of the equations of state of materials [4] and their separate mechanical characteristics [5]. Fine-grained powders of metal compounds (nitrides, carbides, oxides, and borides) are used as a hardening phase in designing composite materials based on polymers.…”

Section: Introductionmentioning

confidence: 99%

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Destruction of filled polymer targets by high-velocity impact

Pilyugin

2008

Combust Explos Shock Waves

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An analysis is made of experimental results on impact (at velocities of 0.6-6.26 km/sec) of projectiles made of Caprolon and polyethylene and compound projectiles (made of Caprolon with steel or aluminum spheres) on targets made of an epoxy resin with and without a filler (Al 2 O 3 ) in a ballistic range. Impact on the edge surface of cylindrical targets with a characteristic size of 0.05 m is investigated. Complete fracture of the targets was recorded at velocities above 1 km/sec. The masses and dimensions of the collected fragments are subjected to statistical analysis. Average values of the fragment sizes and specific surface fracture energy are calculated.

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“…A visual analysis of the sieved material (see Figs. [2][3][4] showed that the fraction of the fine fraction increased with increasing impact velocity v 0 . …”

Section: Results and Tentative Analysis Of The Experimentsmentioning

confidence: 99%

Section: Calculations Of Postshock Parameters In the Filled Epoxy Resmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Destruction of filled polymer targets by high-velocity impact

Pilyugin

2008

Combust Explos Shock Waves

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“…The method of investigation of shear viscosity of matter behind the shock front [1] was suggested by Academician A.D. Sakharov and associates in 1957 [51]. The method is based on studying the time evolution of small harmonic perturbations developed on the front of a shock wave propagating in the material being investigated, with subsequent comparison of the experimental results with theory.…”

Section: Determining the Viscosity By The Methods Of Harmonic Perturbamentioning

confidence: 99%

Measurements of the viscosity of water under shock compression

Минеев

Funtikov

2005

High Temp

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The results of measurements of the shear viscosity of shock-loaded water, obtained by the method of decay of perturbations on a corrugated shock front suggested by Sakharov et al. [1], are treated in the light of new data on the phase diagram of water. The experimental data on viscosity in the pressure range from 4 to 25 GPa are compared to the results of measurements by other methods. The high values of viscosity at high pressures are attributed to the formation a water-ice VII mixture under shock compression of water.

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“…Today, a wide variety of ways of generating intense shock waves is employed in dynamic experiments. These are chemical, nuclear, and electric explosions; pneumatic, gun powder, and electrodynamic guns; concentrated laser and soft X-ray radiation; and relativistic electron and ion beams [1,8,22,[26][27][28][29][30][31].…”

Section: Eos: Theory and Experimentsmentioning

confidence: 99%

Equations of State of Matter at High Energy Densities

Фортов¹,

Ломоносов²

2014

TOPPJ

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Abstract:The physical properties of hot dense matter over a broad domain of the phase diagram are of interest in astrophysics, planetary physics, power engineering, controlled thermonuclear fusion, impulse technologies, enginery, and other applications. The present report reviews the contribution of modern experimental methods and theories to the problem of the equation of state (EOS) at extreme conditions. Experimental techniques for high pressures and high energy density cumulation, the drivers of intense shock waves, and methods for the fast diagnostics of high-energy matter are considered. It is pointed out that the available high pressure and temperature information covers a broad range of the phase diagram, but only irregularly and, as a rule, is not thermodynamically complete; its generalization can be done only in the form of a thermodynamically complete EOS. As a practical example, construction of multi-phase EOS for tungsten is presented. The model's results are shown for numerous shock-wave data, the high-pressure melting and evaporation regions and the critical point of tungsten.

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Development of dynamic high-pressure techniques in Russia

Cited by 30 publications

References 51 publications

Destruction of filled polymer targets by high-velocity impact

Destruction of filled polymer targets by high-velocity impact

Measurements of the viscosity of water under shock compression

Equations of State of Matter at High Energy Densities

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