An approximate theory for dynamic pressure of solids on mass-flow bins.

概要

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The present paper deals firstly with the criterion concerning the hopper included angle which guarantees that solids behave in a mass-flow state in a bin, and secondly with an approximate theory for the dynamic pressures acting on mass-flow bins during emptying. Referring to the profile of failure planes observed within solids flowing in model hoppers, the critical hopper angle for mass flow was theoretically determined as a function of frictional angles. The dynamic pressures on bin walls and the concentrated pressure acting at the transition from a vertical section of a bin to a hopper of converging walls were predicted assuming that the stress patterns which exist within the bin are characteristic of mass flow conditions. The results obtained are compared with recent theoretical and experimental work.
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