粉体の内部摩擦および付着力について

概要

論文の詳細を見る
The internal friction and the cohesive force of various powders have been measured to make clear the fluidity of powder by a direct shear method, and the effects of moisture on them have been investigated.　Ten kinds of samples...foods powders, baby powder, cleanser, quartz, and Toyoura standard sand...were used in measurements samples used in the experiments to examine the effects of moisture were quartz and Toyoura standard sand regulated partucle size in advance.　It was found that the cohesive force was in the region of 0.01-0.14 Kg/cm^2 and that the angle of the internal friction which was in the region of 21-38゜ was smaller than the angle of repose in any powders.　For the behavior of powder bed during the shear, the shearing stress increased with the horizontal displacement and approched a constant. The vertical strain decreased with increase in the shearing stress. Sugar, quartz and Toyoura standard sand showed dilatant phenomena remarkably.　The internal friction increased as the moisture increased and came up to a constant. The cohesive force of quartz increased with moisture, but that of Toyoura standard sand showed a tendency to increase after decreasing in the beginning.
山形大学の論文
1981-01-20