DEM investigations of two-dimensional granular vortex- and anti-vortex-structures during plane strain compression

作者：Kozicki J; Tejchman J^*

来源：Granular Matter, 2016, 18(2): UNSP 20.

DOI：10.1007/s10035-016-0627-z

• Plane strain compression testa
• Granular material
• Discrete element method
• Vortex
• Anti-vortex

The paper presents simulation results of a quasistatic plane strain compression test on cohesionless initially dense sand under constant lateral pressure using a three-dimensional discrete element method. Grains were modelled by means of spheres with contact moments imitating irregular particle shapes. The material behaviour was studied at both global and local levels. The stress-strain and volumetric-strain curves, distribution of void ratio, resultant grain rotation and contact forces were calculated. The main attention was paid to the appearance of plane strain granular micro-structures like vortex and anti-vortex structures in the granular specimen during deformation. In order to detect two-dimensional vortex and anti-vortex structures, a method based on orientation angles of displacement fluctuation vectors of neighbouring single spheres was used. The effect of the method parameters was also analyzed.

• 出版日期2016-5