The Influence of the Fluctuation of Micro-Polar Boundary Conditions on the Evolution of Shear Strain Localization in Granular Materials
In this paper the interface behavior between an infinite strip of a granular mate- rial and a rough boundary under plane shearing is numerically investigated using a micro-polar continuum approach. Particular attention is paid to the influence of a fluctuation of micro-polar boundary conditions along the interface on the evolution of shear strain localization within the granular material. The mechanical behavior of the cohesionless granular material is described with a micro-polar hypoplastic model. The evolution equations for the stress and the couple stress are non-linear tensor valued functions which model inelastic behavior. The investigations show that the micro-polar boundary conditions have a strong influence on the location and thickness of the zone of strain localization when relative displacements within the interface are excluded.
N. Ohno and T. Uehara
E. Bauer et al., "The Influence of the Fluctuation of Micro-Polar Boundary Conditions on the Evolution of Shear Strain Localization in Granular Materials", Key Engineering Materials, Vols. 340-341, pp. 1255-1260, 2007