Cyclic Critical Stress States of Sand with Nonfrictional Effects
Publication: Journal of Engineering Mechanics
Volume 125, Issue 10
Abstract
New observations of experimental facts are made in this study to understand the physical essentials regarding the changes in mobilized maximum stress and phase-transformation stress states of saturated sands subjected to cyclic undrained shear applications. Saturated sands are not purely frictional materials that are governed only by frictional law (i.e., the shear-normal stress ratio). They are also characterized by the following effects of nonfrictional behavior: (1) Irreversible dilatancy effect; (2) viscous effect at large strain rate; and (3) coupling effect of viscous to frictional resistance. It was found that the first effect reduces the limiting shear resistance, whereas the second and third effects increase it. Based on this finding, 2D and 3D criteria that consider both the frictional and nonfrictional effects are developed by introducing several new concepts such as the “true effective stress,” “moving stress space,” and “moving spatially mobilized plane.” Their effectiveness is confirmed experimentally.
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Information & Authors
Information
Published In
Journal of Engineering Mechanics
Volume 125 • Issue 10 • October 1999
Pages: 1106 - 1114
History
Received: Aug 8, 1997
Published online: Oct 1, 1999
Published in print: Oct 1999
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