Some Nonlinear Rock Behavior Effects
| Autor: | Yu. P. Stefanov |
|---|---|
| Rok vydání: | 2018 |
| Předmět: |
010504 meteorology & atmospheric sciences
Numerical modeling Model parameters 02 engineering and technology Surfaces and Interfaces Mechanics Deformation (meteorology) Condensed Matter Physics 01 natural sciences Physics::Geophysics Nonlinear system 020303 mechanical engineering & transports 0203 mechanical engineering Mechanics of Materials General Materials Science Stage (hydrology) Partial closure Geology 0105 earth and related environmental sciences |
| Zdroj: | Physical Mesomechanics. 21:234-241 |
| ISSN: | 1990-5424 1029-9599 |
| Popis: | The nonlinear rock behavior effects observed in loading diagrams are analyzed which are usually ignored in conventional models of elastoplastic media. The initial deformation stage and unloading of rock samples are considered. The nonlinear behavior on these loading stages is interpreted from the viewpoint of partial closure of cracks initiated during deformation beyond the elastic limit or in earlier loading history. Phenomenological relations are derived to account for the discussed nonlinear effects in numerical modeling. The postcritical deformation stage corresponding to the stage of strain localization and main crack formation is studied. Corrections are made to provide a more accurate determination of model parameters. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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