Complex Loading of Granular Materials with Continuous Rotation of Strain Axes
A. F. Revuzhenko1, V. P. Kosykh1
Chinakal Institute of Mining, Siberian Branch, Russian Academy of Sciences, Novosibirsk, Russia
Keywords: Shearing strain, complex loading, dilatancy, stresses, inelastic media, cyclic deformation, uniform flow
Abstract
The granular and other similar-type materials without cohesion are tested on various mode shearing machines. The complex loading machine with continuous rotation of principal strain axes is described. Loading represents a superposition of the planar and parallel Couette flows (simple shears) between parallel plates rotated at a certain angular rate. The stress and dilatancy data of quartz sand in deformation on the designed equipment are reported. It is found that stresses and dilatancy in cyclic deformation tend to stationary values. The stationary values of dilatancy increase with increasing shearing strain. The stationary deformation stresses change periodically, their average values weakly depend on the cyclic strains and their amplitude increases.
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