FE-simulations of rapid silo flow with a polar elasto-plastic constitutive model

• Autorzy: Tejchman J.
• Języki publikacji: EN

Abstrakty

EN

The paper presents results on numerical modelling of rapid flow of granular materials in a model silo with convergent smooth walls. The calculations were performed with a finite element method based on a polar elasto-plastic constitutive relation by Muhlhaus (1995). The relation differs from the conventional theory of plasticity by the presence of Cosserat rotations and couple stresses using a mean grain diameter as a characteristic length. The characteristic length causes that numerical results do not depend upon the mesh discretisation. The model tests on rapid silo flow of glass beads performed by Renner in a glass hopper with a large wall inclination from the bottom were numerically simulated. The plane strain FE-calculations were performed by taking into account inertial forces and linear viscous damping. A satisfactory agreement between numerical and experimental results was obtained. Advantages and limitations of a continuum approach for simulations of rapid silo flow were outlined.

Słowa kluczowe

EN

finite element simulations; polar elasto-plastic constitutive model; silo flow; numerical modelling; model silo; convergent smooth walls

• Wydawca: Politechnika Gdańska
• Czasopismo: TASK Quarterly : scientific bulletin of Academic Computer Centre in Gdansk
• Rocznik: 1998
• Tom: Vol. 2, No 3
• Strony: 473--501
• Opis fizyczny: Bibliogr. 86 poz., rys.

Twórcy

autor

Tejchman J.

• Institute for Concrete Structures, Technical University of Gdańsk, Narutowicza 11/12, 80-952 Gdańsk, Poland

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