Algorithm to Generate a Discrete Element Specimen with Predefined Properties

Deformation behaviour of gap-graded fouled ballast evaluated by a 3D discrete element method

“…In triaxial compression test simulation, the stress-strain behaviour was modelled by elastic-perfectly plastic constitutive model for both fresh and fouled ballasts. Recently, a few researchers used the YADE to perform triaxial compression tests and reported consistent results with the laboratory experiments (Scholtes et al, 2009;Widulinski et al, 2009;Dang and Meguid, 2010). Mode details on the YADE can be found in Smilauer et al (2010).…”

Estimating earth loads on buried pipes under axial loading condition: insights from 3D discrete element analysis

“…Using these scale factors a total number of 265,000 spheres are generated to create the soil specimen. The fabric tensor of the sample was investigated following the approach proposed by Dang and Meguid [11]. It was found that the fabric tensor components are almost identical in all directions, which confirms that the discrete element sample is homogeneous.…”

Evaluation of land subsidence and ground failures at Bicycle Basin, Fort Irwin National Training Center, California, 1992–2017

“…Calibration was carried out by adjusting the free parameters iteratively, so as to closely reproduce the characteristic size of polygons formed in the desiccationcrack experiments. Initially, a confined region (fixed, rigid boundary planes) of the same dimensions as in the laboratory experiments was populated with approximately 40,000 spherical elements, following the procedure proposed by Dang and Meguid (2010), at a uniform size distribution with a coefficient of variation of 30 percent. Subsequently, a layer of two elements at the lateral boundaries and the bottom of the domain had all degrees of freedom blocked to represent the mold of the laboratory desiccation experiments.…”