Structural-scaling transitions in mesodefect ensembles as mechanisms of relaxation and failure in shocked and dynamically loaded materials (experimental and theoretical study)

Abstract

Nonlinear aspects of relaxation and are related to new type of critical phenomena in ensembles of mesoscopic defects - structural-scaling transitions, generation of specific collective modes of mesodefects, which subject the relaxation and kinetics of damage-failure transition. Theoretical results were supported by original experiments and allowed us to propose the explanation: the transition from the steady-state to the branching and stochastic regimes of crack dynamics, fragmentation scenario, the steady-state structure and the four power law universality of the plastic front, the failure wave phenomenon as delayed effect related to the excitation and propagation of mesodefects collective mode with blow-up damage localization kinetics.