Summary
The constitutive equations of a two-dimensional flow theory of plasticity for granular materials with Cosserat structure are outlined. The post-failure behavior is modeled by means of softening rule that is based on a two fractions mixtures theory for sand. The paper is focusing on the two major bifurcation phenomena observed in element tests, i.e. shear-banding and liquefaction.
übersicht
Die Stoffgleichungen einer zweidimensionalen Theorie des plastischen Flie\ens für körnige Materialien mit Cosserat-Struktur werden dargestellt. Das Materialverhalten nach dem Versagen wird mit Hilfe eines Entfestigungsgesetzes beschrieben, welches sich auf ein Zweikomponenten-Mischungsmodell für Sand stützt. Diese Arbeit konzentriert sich auf die zwei Hauptverzweigungsprobleme, die in Elementversuchen beobachtet werden, nÄmlich Scherfugenbildung und Bodenverflüssigung.
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Vardoulakis, I. Shear-banding and liquefaction in granular materials on the basis of a Cosserat continuum theory. Ing. arch 59, 106–113 (1989). https://doi.org/10.1007/BF00538364
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DOI: https://doi.org/10.1007/BF00538364