Modeling of textural anisotropy in granular materials with stochastic micro-polar hypoplasticity

• Published in: International journal of non-linear mechanics Vol. 42; no. 6; pp. 882 - 894
• Main Authors: Tejchman, Jacek, Wu, Wei
• Format: Journal Article
• Language: English
• Published: Elsevier Ltd 01.07.2007; Elsevier
• Subjects: Finite element method; Granular material; Micro-polar hypoplasticity; Random field; Shear zone; Textural anisotropy; Finite element method; Textural anisotropy; Random field; Granular material; Micro-polar hypoplasticity; Shear zone; Physical Sciences
• ISSN: 0020-7462; 1878-5638
• DOI: 10.1016/j.ijnonlinmec.2007.03.015

The paper deals with a numerical analysis of the effect of textural anisotropy on the behaviour of cohesionless granular materials with consideration of shear localization. For a simulation of the mechanical behaviour of a granular material during a monotonic deformation path, an isotropic micro-polar hypoplastic constitutive model was used. To describe textural effects, spatially correlated random fields of the initial void ratio were subject to rotation against the horizontal axis. The 2D random fields were generated using a conditional rejection method. The results were compared with those obtained with an anisotropic micro-polar constitutive model for a uniform distribution of the initial void ratio. The calculations were carried out with an initially dense granular specimen during plane strain compression under constant lateral pressure.