Granular Material Storage: Wall Friction Studies in Scale Silos and Shear Cells

摘要

The frictional behaviour of powder and particulate materials in all engineering applications is principally described by the coefficient of internal friction and the coefficient of wall friction. In this paper we present theoretical and experimental research on the wall friction in steel silos during filling and discharge of the ensiled materials (particulate materials) and friction parameter in shear cells. The wall friction is found experimentally by using a measurement of the wall stresses in full scale silos and model silos. The results obtained concern the wall friction at the filling and discharge procedures of wheat and peas in full scale silos. The coefficient values obtained are compared with the values given by classical tests in the laboratory using shear cells with analogical granular material.