J. Phys. IV France
Volume 134, August 2006EURODYMAT 2006 - 8th International Conference on Mechanical and Physical Behaviour of Materials under Dynamic Loading
|Page(s)||3 - 8|
|Publié en ligne||26 juillet 2006|
J. Cirne, R. Dormeval, et al.
J. Phys. IV France 134 (2006) 3-8
Structural-scaling transitions in mesodefect ensembles as mechanisms of relaxation and failure in shocked and dynamically loaded materials (experimental and theoretical study)O.B. Naimark
Institute of Continuous Media Mech. of RAS, Perm, 614013, 1 Acad. Korolev Str.
Published online: 26 July 2006
Nonlinear aspects of relaxation and failure 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 wave front, the “failure wave” phenomenon as delayed failure effect related to the excitation and propagation of mesodefects collective mode with “blow-up” damage localization kinetics.
© EDP Sciences 2006