In-situ dynamic experiments and modeling in multiscale kinetics of damage-failure transition

摘要

Scaling regularities that reveal the power law statistics of fragmentation and selfsimilarity of damage-failure transitions are linked to specific type of critical phenomena in ensembles of typical mesoscopic defects - structural-scaling transition. Taking into account nonlinearity of damage-failure transition the scaling effects were explained as the consequence of subjection of damage kinetics to the intermediate asymptotical (self-similar) solution. This solution has the nature of multiscale blow-up dissipative structures, represents the set of collective modes of defects responsible for the damage localization stage. Original in-situ experiments supported the assumption concerning the role of multiscale blow-up collective modes of defects in qualitative different scenario of dynamic crack propagation, failure of shocked materials, fragmentation statistics.