Summary
The paper deals with numerical investigations on the patterning of shear zones in granular bodies. The behavior of dry sand during plane strain compression tests was numerically modelled with a finite element method using a hypoplastic constitutive relation within a polar (Cosserat) continuum. The constitutive relation was obtained through an extension of a non-polar one by polar quantities, viz. rotations, curvatures, couple stresses using the mean grain diameter as a characteristic length. This relation can reproduce the essential features of granular bodies during shear localisation. During FE-calculations, the attention was laid on the influence of boundary conditions and the distribution of imperfections in the granular specimen on the formation of patterns of shear zones.
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Tejchman, J. Patterns of shear zones in granular bodies within a polar hypoplastic continuum. Acta Mechanica 155, 71–94 (2002). https://doi.org/10.1007/BF01170841
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DOI: https://doi.org/10.1007/BF01170841