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International Journal for Multiscale Computational Engineering
インパクトファクター: 1.016 5年インパクトファクター: 1.194 SJR: 0.554 SNIP: 0.82 CiteScore™: 2

ISSN 印刷: 1543-1649
ISSN オンライン: 1940-4352

International Journal for Multiscale Computational Engineering

DOI: 10.1615/IntJMultCompEng.v3.i2.20
pages 135-148

Modeling of Mechanical Behavior of Geomaterials on the Mesoscale

Pavel V. Makarov
Institute of Strength Physics and Materials Science, Siberian Branch Russian Academy of Sciences, pr. Academicheskii 2/1, Tomsk 634021, Russia
Yurii P. Stefanov
Institute of Strength Physics and Materials Science, Siberian Branch Russian Academy of Sciences, pr. Academicheskii 2/1, Tomsk 634021, Russia
Igor Yu. Smolin
Institute of Strength Physics and Materials Science, Siberian Branch Russian Academy of Sciences, pr. Academicheskii 2/1, Tomsk 634021, Russia
Oleg I. Cherepanov
Institute of Strength Physics and Materials Science, Siberian Branch Russian Academy of Sciences, pr. Academicheskii 2/1, Tomsk 634021, Russia

要約

To analyze deformation of geomaterials with space and time, two modeling methods are described: a dynamic method where fracture is taken into account explicitly with special emphasis on crack system formation, their coalescence, etc.; a quasi-static method where specific consideration is given to the influence of temperature at quasi-static loading. The constitutive equations used take into account the dilatancy effects, damage accumulation, and degradation of mechanical properties. Consideration is given to calculation examples of deformation and damage localization observed at various scales, namely, from small laboratory samples up to huge crustal elements. In the framework of the dynamic approach, the formations of bands of localized deformation in the vicinity of a failed inclusion and within a medium layer in shear are obtained. Features of strain localization for several geological models of the lithosphere are presented. In the framework of the quasi-static approach, the formation of ring-like structures under cooling of a heterogeneous media is discussed. These problems are considered as the problems of mesoscale since essential meso-constituents are taken into account.


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