Thermodynamic parameters of heterogeneous materials under shock-wave loading in presentation of equilibrium model

31st International Conference on Equations of State for Matter

Maevskii, K.K.^1 ; Kinelovskii, S.A.^1

Lavrentyev Institute of Hydrodynamics of the Siberian Branch of the Russian Academy of Sciences, Lavrentyev Avenue 15, Novosibirsk

630090, Russia^1

关键词: Computational results;    Equilibrium modeling;    Heterogeneous materials;    Neisen coefficients;    Numerical experiments;    Shock-wave loading;    Temperature approximation;    Thermodynamic parameter;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/774/1/012010/pdf
DOI  :  10.1088/1742-6596/774/1/012010

来源: IOP

【 摘 要 】

The results of numerical experiments on modeling of shock wave loading of solid and porous heterogeneous materials on the example of molybdenum and some alloys included molybdenum as a component are presented. A thermodynamically equilibrium model is applied to describe the behavior of solid and porous materials. This model ensures good compliance with the experiment in a wide range of pressures. The gas in pores, which is a component of the medium, is taken into account in this model. The equation of state of the Mie-Grüneisen type with allowance for the dependence of the Grüneisen coefficient on temperature is used for condensed phases. The applied model allows the behavior of the molybdenum with porosity from 1 to 3 to be calculated under shock-wave loading at pressures above 5 GPa in the one-velocity and one-temperature approximations, as well as on the assumption of equal pressures for all the phases. Computational results are compared with the well-known experimental results obtained by different authors. The model permits the shock-wave loading of solid and porous alloys with molybdenum in their composition to be described reliably solely by using species parameters.