A Two-Scale Numerical Approach to Granular Systems / Wybrane Problemy Szacowania Prawdopodobienstwa Zawodu W Sytuacji Pozaru
Autor(en): |
M. Nitka
J. Tejchman |
---|---|
Medium: | Fachartikel |
Sprache(n): | Englisch |
Veröffentlicht in: | Archives of Civil Engineering, September 2011, n. 3, v. 57 |
Seite(n): | 313-330 |
DOI: | 10.2478/v.10169-011-0022-4 |
Abstrakt: |
A two-scale numerical homogenization approach was used for granular materials. At small-scale level, granular micro-structure was simulated using the discrete element method. At macroscopic level, the finite element method was applied. An up-scaling technique took into account a discrete model at each Gauss integration point of the FEM mesh to derive numerically an overall constitutive response of the material. In this process, a tangent operator was generated with the stress increment corresponding to the given strain increment at the Gauss point. In order to detect a loss of the solution uniqueness, a determinant of the acoustic tensor associated with the tangent operator was calculated. Some elementary geotechnical tests were numerically calculated using a combined DEM-FEM technique |
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10477033 - Veröffentlicht am:
25.11.2020 - Geändert am:
25.11.2020