Influence of particle shape on shear band formation of quasistatic granular media
نویسندگان
چکیده
We study the influence of particle shape on the shear band formation in quasistatic granular media in biaxial compression test using two-dimensional Distinct Element Method (DEM). Elliptical-shaped particles are used to study the influence of particle shape. We also report an experimental verification to check the ability of DEM to model elliptical particles created by the clustering technique. It is observed in the experimental verification that DEM can model the elliptical particle. We simulate the shear band formation in biaxial compression test of granular media of elliptical particles using DEM. It is found that by using non-circular particles (e.g., elliptical in this study), generation of large voids and excess particle rotations inside the shear band are reproduced in a quite similar manner to those of the natural granular soils, which are difficult to produce with DEM model using circular particles unless rolling resistance used.
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بررسی عددی تأثیر خصوصیات خاک بر باندهای برشی
In some natural events such as soil failure the deformations are localized in narrow restrictions, which are called shear bands. This event which is a fundamental phenomenon in granular material, has been widely investigated during recent decades within expensive experimental tests and also some numerical simulations. Most of previously used numerical methods are based on continuum theories des...
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