Transmission of a shock load by bulk media

Interaction of a normally incident shock wave with a porous material layer on a solid wall

“…The computed results were verified against experimental data on the normal and longitudinal interaction of the shock wave with a polystyrene layer [3] and on interaction of the transient shock wave with soot particles lying on the bottom of a shock tube [4]. Good agreement of parameters in terms of the pressure distributions on the top and bottom of the tube was reached.…”

Numerical study of the transfer of shock-wave loading to a screened flat wall through a layer of a powdered medium and a subsequent air gap

“…The process of the shock-wave action on a solid wall covered by a layer of granular powder was experimentally studied in [12,13], where it was noted that the time evolution of the total stress of the granular medium on a screened wall is qualitatively identical to that in the case of a porous compressible material. In addition, however, it was found (by measuring the pressure of the pore gas on a solid wall) that a typical decay of the total stress of the disperse mixture on the wall surface is caused by circulation of the so-called fast (deformation) wave over the powder "skeleton" [14].…”

“…Using the method developed in [12,13], Ben Dor et al [16][17][18] continued the experimental study of the laws of interaction of weak air shock waves with a layer of a granular medium that covers a solid wall. In contrast to [12,13], the total stress of the mixture and the pressure of the pore gas were measured in [16][17][18] not only at the end of the shock tube but also in several cross sections of the granular medium layer.…”

“…Gubaidullin et al [25][26][27][28][29][30][31][32] used the assumption of the linear-viscoelastic deformation of the powder skeleton by the scheme proposed in [35], and the numerical solution of the equations of motion of the phases of the medium saturated by a gas was performed by the LaxWendroff method [30,32]. The numerical data were compared in [21,29] with the experimental results of [12,17], and it turned out that the models of motion of the phases offer satisfactory descriptions of the wave processes in screening layers of porous powdered media. The effect of the governing parameters of the granular medium and the air shock wave on the total stress of the mixture and the pressure of the pore gas on a screened wall was analyzed in [22,23,29].…”

“…In contrast to [12,13], the total stress of the mixture and the pressure of the pore gas were measured in [16][17][18] not only at the end of the shock tube but also in several cross sections of the granular medium layer. Formation of unsteady fields of the gas pressure in granular media and the effect of gas filtration on the evolution of pressure waves in porous granular media were considered in detail in [16][17][18].…”