Stress Fluctuations for Continuously Sheared Granular Materials
- 7 October 1996
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review Letters
- Vol. 77 (15) , 3110-3113
- https://doi.org/10.1103/physrevlett.77.3110
Abstract
Experiments on continuously sheared granular materials (glass spheres) with diameters show large fluctuations in the normal stress, . Experiments are carried out in an annular Couette geometry for rotation rates . Power spectra from , , show rate invariance in the fluctuations: is a function only of , independent of . depends relatively weakly on . The distributions of stresses are similar to recent predictions for static arrays, but the width of varies only weakly with , suggesting stronger spatial correlation effects than expected from theory.
Keywords
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