Dynamic Pore-Pressure Fluctuations in Rapidly Shearing Granular Materials
- 10 November 1989
- journal article
- research article
- Published by American Association for the Advancement of Science (AAAS) in Science
- Vol. 246 (4931) , 796-799
- https://doi.org/10.1126/science.246.4931.796
Abstract
Results from two types of experiments show that intergranular pore pressures fluctuated dynamically during rapid, steady shear deformation of water-saturated granular materials. During some fluctuations, the pore water locally supported all normal and shear stresses, while grain-contact stresses transiently fell to zero. Fluctuations also propagated outward from the shear zone; this process modifies grain-contact stresses in adjacent areas and potentially instigates shear-zone growth.Keywords
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