Abstract
Data on the dynamic strength and plasticity of the material, including the dynamic yield limit, spall strength, threshold of structural instability and particle velocity distribution, are inferred from the temporal profiles of the free surface velocity, ufs(t), and velocity dispersion profiles which are registered with the velocity interferometer. Three dynamic characteristics are used in the present analysis. One of the basic characteristics of dynamic deformation that reflects the transition of a material into a structurally unstable state and provides quantitative data on the exchange of energy and momentum between scales is the “defect of particle velocity”. It is determined in tests under uniaxial strain conditions as the difference between the velocity of the impactor under a symmetrical collision and the maximum free surface velocity at the plateau of the compressive pulse, \(\delta u_{{{\text{def}}}} = (U_{{{\text{imp}}}} - U_{{{\text{fs}}\,\max }} )\).
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