抄録
The problems of predicting the dynamic peak pressures during mass flow have been investigated. In a portion of a vertical-sided silo, the stress fields adjacent to a wall have been derived by the observation of a flow pattern which shows simultaneous yield within the solids layer along the wall. An equation on the local passive yielding is presented in order to predict the peak pressures.
Measurements of the wall pressure show that the equation predicts accurately the maximum peak pressures. In a portion of a convergent hopper, the stress condition during emptying has been examined by measurement of the static rearranged wall pressure distribution after flow, and the dynamic surcharge for the transition to be emplyed is predicted experimentally.
