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766Reynolds was likely the first to direct his attention to the non Newtonian behavior of simple liquids upon the shear flow [1] associated with nonequilibrium (vis cous elastic) effects of shear and volume distortion (local density change) caused by the structure of liq uid. Molecular dynamic modeling [2] of mass trans port in simple liquids confirmed the finding [3] of the existence of long period components in the relaxation spectrum. This corresponds to the measurement data on the shear moduli and relaxation spectra when Abstract-Non Newtonian properties of water in the shock wave (electroexplosive) experiment are studied. Powerlike dependences of the deformation rate depending on the stress amplitude at the wave front and the spall strength depending on the strain rate during unloading are obtained.

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Specific features in the deformation of polycrystalline vanadium under shock wave loading con ditions have been studied by experimental and theoretical methods. Analysis of the full wave profiles was used to determine the dynamic elastic limit and spall fracture stress in a range of stain rates of 10 5 -10 7 s -1 . The laws of elastic-plastic transition at the shock wave front, mechanisms of elastic precursor relaxation, and spall fracture development are discussed.