Instability and Static Liquefaction on Proportional Strain Paths for Sand at Low Stresses
Publication: Journal of Engineering Mechanics
Volume 130, Issue 11
Abstract
The behavior of Hostun RF sand on proportional strain paths at low confining pressures (20 to 100 kPa) is considered in this paper. In such paths, a constant dilation rate is imposed during shear. The usual features of pore pressure increase (contracting material) or decrease (dilating material) are here observed depending upon whether the imposed dilation rate is respectively greater or smaller than the “natural” dilation rate at failure (as measured in a drained test). Particular attention is given to the static liquefaction phenomenon, which is seen to occur for loose as well as dense sand provided the imposed dilation rate is large enough to lead to a continuous pore pressure increase during shear. Instability tests performed at low confining pressures on proportional strain paths show that the instability line is strain path dependent. It does not coincide with the peak deviator stress line in proportional strain paths tests, in general, but does coincide with the line (nil second increment of total work).
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Information & Authors
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Published In
Journal of Engineering Mechanics
Volume 130 • Issue 11 • November 2004
Pages: 1365 - 1372
Copyright
Copyright © 2004 ASCE.
History
Published online: Nov 1, 2004
Published in print: Nov 2004
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