Abstract
The problems of predicting the bulk density and the principal stress direction in a high-rate charge from a high position, which is one of the latest methods, are investigated experimentally. The results obtained show that the effects of rate of charge on the static wall pressures in a vertically-sided silo are not very large, but that in the convergent hopper they are sufficiently large to be taken into account for design purposes.Different stress states in the convergent hopper of previous works have been proposed in the theoretical prediction based on the measurements of wall pressure. That is the major principal stress direction with cohesionless bulk solids, 2ε, attains to be zero deg. in the high-rate charge, which is vertical to the hopper wall.
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