Effects of Wall Inclinations and Wall Imperfections on Pressures during Granular Flow in Silos
| Autor: | Jacek Tejchman |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2014 |
| Předmět: | |
| Zdroj: | KONA Powder and Particle Journal, Vol 20, Iss 0, Pp 125-132 (2014) |
| Druh dokumentu: | article |
| ISSN: | 0288-4534 2187-5537 |
| DOI: | 10.14356/kona.2002015 |
| Popis: | The effects of wall inclinations and wall imperfections at the onset of granular flow in a silo are numerically studied. The calculations were carried out for the onset of quasi-static mass flow in a silo with a controlled outlet velocity along the entire bottom. In the analysis, a finite element method and a polar hypoplastic constitutive law were used. A polar hypoplastic law describes the salient properties of granular bodies. FE calculations were performed with a plane strain silo with parallel walls, slightly convergent walls, slightly divergent walls, and parallel and convergent walls. The influence of a wall imperfection directed inwards and a wall imperfection directed outwards in a silo with parallel walls was also analysed. The FE results showed a large sensitivity of stresses in bulk solids due to the change of the direction of shear deformation along the silo wall. |
| Databáze: | Directory of Open Access Journals |
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