The Use of the Isotropic Sodium Chloride Acoustic Velocity Ratio in Ultra High Pressure Physics
The isotropic velocity ratio is an intensive variable which can be obtained directly from experimental data in very high pressure experiments. Up to now it may be the only intensive variable directly measurable in the massive optically opaque pressure devices in the pressure range greater than 100 kbar. The information it provides presents untried potentialities in the understanding of the high pressure state. Our purpose is to discuss its use as a means of comparison, between experiments in which different methods are used to measure the pressure dependence of the elastic properties of a material, or between experimental results and theoretical predictions, as a continuous pressure scale, and as a means of obtaining the equation of state of a material as a function of pressure. Regarding the last point we present results of a study in which we used finite deformation elasticity.
KeywordsVelocity Ratio Shear Velocity Critical Resolve Shear Stress Intensive Variable Order Elastic Constant
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