Complex deformation and fracture of geological interfacial media

E. V. Shilko, S. V. Astafurov, S. G. Psakhie, V. V. Ruzhich, O. P. Smekalin

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Citation (Scopus)

Abstract

It is well known, that response and fracture o interfacial materials is defined in a great extent by strain localization in interblock (or intergranular) interfaces. Composite, nanostructural and heterostructural materials are striking examples of interfacial media. Moreover, the natural geomaterials and geo-media also belong to this kind of media. Seismically active faults of different sizes and depth can be considered as inter-plate interfaces (analogues of grain boundaries). Irreversible displacement of fault banks is one of mechanisms of stress relaxation in the geo-medium. It is well known that high-frequency vibration loading of nanostructural materials can change their response dramatically. So, the paper was devoted to complex investigation (including full-scale geophysical experiments and computer-aided simulation) of response of seismically active faults under alternating-sign loads. The theoretical part of the paper is based on movable cellar automata (MCA) method. The results show that applied vibrations are able to initiate the large irreversible displacements of the fault sides. It was discovered that water saturation of fault region considerably decreases shear resisting force and changes character of displacements in the fault (from stick-slip regime to viscous one). It is shown that combined use of these factors makes possible transition from single acts of release of large doses of accumulated elastic energy of depths (mechanism of strong earthquakes) to it, multiple "extracting" by small portions.

Original languageEnglish
Title of host publicationMultiscaling in Applied Science and Emerging Technology, Fundamentals and Applications in Mesomechanics: Proceedings of the Sixth International Conference for Mesomechanics
EditorsG.C. Sih, T.B. Kermanidis, S.G. Pantelakis
Pages287-292
Number of pages6
Publication statusPublished - 2004
EventMultiscaling in Applied Science and Emerging Technology; Fundamentals and Applications in Mesomechanics:Proceedings of the Sixth International Conference for Mesomechanics - Patras, Greece
Duration: 31 May 20044 Jun 2004

Other

OtherMultiscaling in Applied Science and Emerging Technology; Fundamentals and Applications in Mesomechanics:Proceedings of the Sixth International Conference for Mesomechanics
CountryGreece
CityPatras
Period31.5.044.6.04

Keywords

  • Interfacial geo-medium
  • Seismically active fault
  • Vibration load
  • Water saturation

ASJC Scopus subject areas

  • Engineering(all)

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  • Cite this

    Shilko, E. V., Astafurov, S. V., Psakhie, S. G., Ruzhich, V. V., & Smekalin, O. P. (2004). Complex deformation and fracture of geological interfacial media. In G. C. Sih, T. B. Kermanidis, & S. G. Pantelakis (Eds.), Multiscaling in Applied Science and Emerging Technology, Fundamentals and Applications in Mesomechanics: Proceedings of the Sixth International Conference for Mesomechanics (pp. 287-292)