Non‐coaxiality and stress–dilatancy rule in granular materials: FE investigation within micro‐polar hypoplasticity |
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Authors: | Jacek Tejchman Wei Wu |
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Institution: | 1. Civil and Environmental Engineering Department, Gdansk University of Technology, Gdansk, Poland;2. Institut für Geotechnik, Universit?t für Bodenkultur, 1180 Vienna, Austria |
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Abstract: | This paper deals with FE investigations of shear localization in dilatant granular bodies. The calculations were carried out with a hypoplastic constitutive law enhanced by micro‐polar terms to properly model the shear zone evolution. The behaviour of an initially medium dense sand specimen with very smooth and very rough horizontal boundaries was analyzed during a plane strain compression test. A stochastic distribution of the initial void ratio was assumed to be spatially correlated. Attention was focused on the non‐coaxiality of the directions of the principal strain increments and principal stresses in the shear zone and on the stress–dilatancy rule. Copyright © 2008 John Wiley & Sons, Ltd. |
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Keywords: | finite element method hypoplasticity micro‐polar model non‐coaxiality plane strain compression shear localization stress– dilatancy rule |
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