Mesoscale plastic flow instability in a solid under high-rate deformation |
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| Authors: | T A Khantuleva Yu I Meshcheryakov |
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| Institution: | 1.Saint Petersburg University,St. Petersburg,Russia;2.Institute of Problems of Mechanical Engineering,Russian Academy of Sciences,St. Petersburg,Russia |
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| Abstract: | Here we consider high-rate deformation in solids in the context of a nonlocal transport theory, present a dynamic stress-strain diagram with elastic and plastic portions defined from a single standpoint, determine the conditions for pulse stress accumulation, and propose a mathematical model of momentum and energy exchange between scales and an instability criterion for transient plastic flow under shock loading. Phe instability criterion for high-rate deformation is verified by the example of shock loading of high-strength 30CrNi4Mo steel. |
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