Effect of Gas Flow on Dilatancy and Stress State in Granular Material
A. P. Bobryakov, A. F. Revuzhenko
Chinakal Institute of Mining, Siberian Branch, Russian Academy of Sciences, Novosibirsk, 630091 Russia
Keywords: Сыпучая среда, сдвиговая прочность, воздушная фильтрация, объемный расход воздуха, напряжение, дилатансия, Granular medium, shear strength, air flow, air flow rate, stress, dilatancy
Abstract
A device is developed for loading granular materials by shearing with air flow driven through the material without its pseudo-liquefaction. Internal stresses and dilatancy of a sample are measured depending on shearing angle. It is shown that shear modulus, characterizing material capability to resist shearing as air flow rate is increased, lowers while dilatancy grows.
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