Abstract
Similarity solutions for the steady state equations governing flow of granular materials under gravity in a conical or wedge-shaped hopper are constructed. Such solutions can be considered for various plasticity models. Results obtained under the classical Mohr-Coulomb yield condition are com- pared with those obtained when a von Mises yield condition is imposed. A thorough stability study in the case of Mohr-Coulomb materials, for which several simplications take place, is proposed.
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