3D Finite-Element Simulation of a Square Silo with Flexible Walls
Publication: Journal of Engineering Mechanics
Volume 127, Issue 10
Abstract
Most of the studies that have been published to evaluate stresses on silo walls during filling or discharge stages are based on a rigid wall assumption. In a 2D approach, the wall flexibility can be approximately modeled by using a corrective factor applied to the whole pressure distribution. It has been shown that such models are in agreement with experimental measurements on circular silos. But in square or rectangular silos, the variation of the stiffness of the wall due to vertical or horizontal stiffeners produces nonuniform wall deformations that are not taken into account in the previous axisymmetric 2D model. The aim of this paper is to present a full 3D modeling of the filling and discharge stages using a nonlinear finite-element method. The bulk material behavior is based on an elastoplastic law. Contact elements using a Mohr-Coulomb criterion simulate the interaction between the wall and the bulk material, and the flexibility of the silo structure is modeled with beam and shell elements. A detailed analysis of the numerical results computed for a square silo filled with wheat and discharged through a central outlet is presented and discussed.
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References
1.
Association française de normalisation (AFNOR). ( 1992). “Norme expérimentale Française.” N.F. P22-630, Paris.
2.
Beer, G. ( 1985). “An isoparametric joint/interface element for finite element analysis.” Int. J. Numer. Methods in Engrg., 21, 585–600.
3.
Bohar, L., and Millard, A. ( 1992). “Castem 2000 Guide d'utilisation.” Commissariat à l'Energie Atomique, Département de Mécanique et Technologie, Service d'Etudes Mécaniques et Thermiques, Laboratoire d'Analyse Mécanique des Structures.
4.
Brown, C. J., Lahlouh, E. H., and Rotter, J. M. ( 1995). “Eccentric discharge in rectangular planform silos.” Proc., PARTEC 95, 3rd Eur. Symp. on Storage and Flow of Particulate Solids (Janssen Centennial), 241–250.
5.
Brown, C. J., and Nielsen, J. ( 1998). Silos, fundamentals of theory, behavior and design, E&FN Spon, London.
6.
Brozzetti, J. ( 1989). “Description de la base expérimentale d'essais de cellules métalliques de stockage. Présentation du programme d'essais.” Revue Construction Métallique, 2, 7–17.
7.
Degoutte, G. ( 1989). “Caractérisation en Laboratoire des Propriétés Physiques et Mécaniques des Matières Ensilées.” Revue Construction Métallique, 91–95.
8.
Hujeux, J. C. ( 1979). “Calcul Numérique de Problèmes de Consolidation Elastoplastique.” Thèse de Docteur-Ingénieur, Ecole Centrale de Paris, Paris.
9.
Jarrett, N. D., Brown, C. J., and Moore, D. B. ( 1995). “Stress redistribution in rectangular planform silos.” Géotechnique, London, 45(1), 95–104.
10.
Khelil, A., Sokol, L., and Roth, J. C. ( 1989). “Comparison des résultats des essais in situ avec différents modèles globaux d'évaluation des pressions sur les parois.” Construction Métallique, 2, 51–64.
11.
Ooi, J. Y., and Rotter, J. M. ( 1990a). “Wall pressures in a squat steel silos from simple finite element analysis.” Comp. and Struct., 37(4), 361–374.
12.
Ooi, J. Y., and Rotter, J. M. ( 1990b). “Elastic predictions of pressures in a conical silo hoppers.” Engrg. Struct., 13(2), 2–12.
13.
Ragneau, E., and Aribert, J. M. ( 1995). “Silo pressure calculation: From a finite element approach to simplified analytical solutions.” Bulk Solids Handling, 15(1), 71–84.
14.
Ragneau, E., Aribert, J. M., and Sanad, A. B. ( 1994). “Modèle Tri-dimensionnel aux Eléments Finis pour le Calcul des Actions sur les Parois d'un Silo (Remplissage et Vidange).” Construction Métallique, 2, 3–25.
15.
Sanad, A. M. ( 1997). “Analyse Tridimensionnelle des Actions aux Parois des Silos—Modélisation par Eléments Finis et Méthodes Simplifiées (Remplissage et Vidange).” Thèse de doctorat, I.N.S.A. de Rennes, Rennes, France.
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Received: Apr 27, 2001
Published online: Oct 1, 2001
Published in print: Oct 2001
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