Abstract
This investigation was carried out by use of the ring shear cell for various kinds of inorganic and organic powders.
Relationship between shear stress τ and normal stress σ fitted well with the equation of yield locus. Each parameters, flowability index n, tensile strength T, cohesive force C was calculated by the computer analysis using χ2-distribution minimum method.
It was found that this method was superior to the single plane shear box method in the reproducibility. However, shear stress measured by this method showed lower value than that by the single plane box method in the range of the same higher normal stress.
