Anomalies of critical state in fracturing geophysical objects

• Published in: Nonlinear Processes in Geophysics
• Main Authors: Chmel, A., Kuksenko, V. S., Smirnov, V. S., Tomilin, N. G.
• Format: Article in Journal/Newspaper
• Language: English
• Published: Copernicus Publications 2007
• Subjects: article; Verlagsveröffentlichung; Sea ice
• Online Access: https://doi.org/10.5194/npg-14-103-2007; https://noa.gwlb.de/receive/cop_mods_00032596; https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00032550/npg-14-103-2007.pdf; https://npg.copernicus.org/articles/14/103/2007/npg-14-103-2007.pdf

Non-linear time-sequences of fracture-related events were studied in drifting sea-ice and fracturing rock. A reversible drop of the b-value was detected prior to the large-scale sea-ice cover fragmentation, when the time sequence of impact interactions between ice-fields was fully decorrelated. A similar loss of the temporal invariance of the fracture process was revealed in the time sequence of microfracture events detected in a loaded rock sample. These temporal gaps in the continuous critical state of the considered self-organizing, open systems were attributed to the property of hierarchicity inherent in the geophysical objects. A combination of scaling and hierarchic features in the behavior of fracturing solids manifests itself in the heterogeneity of the temporal pattern of fracture process.