A Coupled FEM-DEM Approach for Granular Materials
Event details
| Date | 08.11.2011 |
| Hour | 14:00 |
| Speaker | Peter Wriggers, Leibniz University Hannover, Germany |
| Location |
CM 1 106
|
| Category | Conferences - Seminars |
Many of the raw materials handled in chemical industries appear in granulated or particulate form. Ideally in an attempt to reduce laboratory expenses one would like to make predictions of a complex granular flow's behavior by numerical simulations with the primary goal being to minimize time-consuming trial and error experiments. Within this contribution a concurrent two-scale model of non-cohesive frictional granular materials is developed. The approach is motivated by the fact that these materials tend to show localizations of deformation in small domains which can hardly be modeled by the classical continuum approach. The same is true for penetration processes that need usually very special discretization techniques. Therefore these domains will be modeled by a discrete particle method that on the other hand is computationally too expensive to model a complete macroscopic problem. Hence the problem domain is split into a domain of small rather homogeneous deformation that will be modeled as continuum using the Finite Element Method (FEM) and a domain of large eventually discontinuous deformation modeled by a three-dimensional Discrete Element Method (DEM). In the latter method the particles assume individual geometries that are approximated by superquadrics. The domain coupling can either be achieved by a Arlequin method or a classical surface coupling.
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- Alex Spadoni