Shock compression of some porous media in conical targets: numerical study

Charakhch’yan, A. A.; Khishchenko, K. V.; Фортов, В. Е.; Фролова, А. А.; Milyavskiy, V. V.; Shurshalov, L. V.

doi:10.1007/s00193-010-0274-y

Cited by 13 publications

(4 citation statements)

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“…As a result of the simulations, unexpected feature of convergent shock waves in porous media was discovered [36][37][38], which is revealed particularly in threefold increase of maximum pressure in the target at decrease of initial density of the graphite cone from 2.26 to 1.7 g/cm 2 . Conical targets are complex object for experimental study because the diagnostics of hydrodynamic processes within the targets is difficult.…”

Section: Resuming Remarksmentioning

confidence: 88%

“…The use of conical targets for graphite-to-diamond transformation in a convergent shock wave was proposed in [32], investigated with numerical simulations in [33,34] and with explosive experiments in [35]. As a result of the simulations, an unexpected feature of convergent shock waves in porous media was discovered [36][37][38], the like of which was particularly revealed in the threefold increase of maximum pressure in the target following a decrease of the initial density of the graphite cone from 2.26 to 1.7 g cm −2 .…”

Section: Resuming Remarksmentioning

confidence: 99%

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Study of extreme states of matter at high energy densities and high strain rates with powerful lasers

et al. 2016

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Section: Resuming Remarksmentioning

confidence: 88%

Section: Resuming Remarksmentioning

confidence: 99%

Study of extreme states of matter at high energy densities and high strain rates with powerful lasers

et al. 2016

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“…Conversely, nongeometric models such as those expressed by Zel'dovich and Raizer [6], McQueen et al [7] and Charakhch'yan [8][9][10] allow 2D and 3D computations. They suppose an almost instantaneous density transition between the initial porous state and the solid state.…”

Section: Enhancement Of a Dynamic Porous Model Considering Compressiomentioning

confidence: 99%

Enhancement of a dynamic porous model considering compression-release hysteresis behavior: application to graphite

Jodar¹,

Seisson²,

Hebert³

et al. 2016

J. Phys. D: Appl. Phys.

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Because of their shock wave attenuation properties, porous materials and foams are increasingly used for various applications such as graphite in the aerospace industry and polyurethane (PU) foams in biomedical engineering. For these two materials, the absence of residual compaction after compression and release cycles limits the efficiency of the usual numerical dynamic porous models such as Pα and POREQST. In this paper, we suggest a simple enhancement of the latter in order to take into account the compressionrelease hysteresis behavior experimentally observed for the considered materials. The new model, named HPOREQST, was implemented into a Lagrangian hydrocode and tested for simulating plate impact experiments at moderate pressure onto a commercial grade of porous graphite (EDM3). It proved to be in far better agreement with experimental data than the original model which encourages us to pursue numerical tests and developments.

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“…In [11], a model of this kind is noted as an advanced one for multicomponent mixture compositions. A large numbers of both experimental [17][18][19][20][21][22][23][24] and theoretical [25][26][27][28] works are devoted to studying the behavior of porous materials exposed to shock waves. where = is the elastic pressure constit uent described by an equation of the Tait's equation type; is the thermal pressure constituent; ρ is the matter density; ρ 0 is the parameter of equation of state (in the case of condensed matter, it is its density under normal conditions); A, n are the constants char acterizing the matter; γ is the Grüneisen factor; E T is the thermal energy.…”

Section: Introductionmentioning

confidence: 99%

Equation of state for a highly porous material

Bel’kheeva

2015

High Temp

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An equation of state for describing a highly porous material is proposed. The porous medium is considered as a simple thermodynamically equilibrium mixture for which the hypothesis of additivity of vol umes of its components holds true. The equilibrium state is determined by conditions of equality of pressures, temperatures, and velocities of the mixture components. A model of interpenetrating and interacting con tinua is used for the mixture description. The gas available in pores is taken into account in the model. The equations of state of both solid and gaseous components are presented equally (in the form of the Mie-Grü neisen equation with the density dependent Grüneisen factor). By means of presenting functions as Taylor series, relations are deduced that allow the parameters of the equation of state for a porous material to be expressed through the appropriate parameters and mass fractions of the components. Numerical calculations of shock wave loading of porous copper, nickel, iron, and tungsten-nickel-copper mixtures are performed. The derived equation of state is shown to describe quite exactly the behavior of highly porous materials when shock waves propagate in them.

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Shock compression of some porous media in conical targets: numerical study

Cited by 13 publications

References 13 publications

Study of extreme states of matter at high energy densities and high strain rates with powerful lasers

Study of extreme states of matter at high energy densities and high strain rates with powerful lasers

Enhancement of a dynamic porous model considering compression-release hysteresis behavior: application to graphite

Equation of state for a highly porous material

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