Degree Type

Thesis

Date of Award

1-1-2002

Degree Name

Master of Science

Department

Geological and Atmospheric Sciences

Major

Geology

Abstract

Data from stress-controlled ring-shear experiments indicate that shear deformation of saturated granular materials may be repeatedly stabilized by dilatant hardening. For initially dense, saturated sediments, deformation caused by an externally-controlled decrease in effective stress is suppressed by the decline of pore-water pressure that results from shear-zone dilation. Halting of deformation and dilation allows re-equilibration of pore pressure and results in renewed shear. This process is intrinsic to granular materials that dilate during shear displacement and is capable of self-sustaining cyclicity. These findings have important implications for processes such as slow landsliding, aseismic fault slip, and glacier-bed deformation.

DOI

https://doi.org/10.31274/rtd-20200803-288

Copyright Owner

Peter L Moore

Language

en

OCLC Number

51044060

File Format

application/pdf

File Size

83 pages

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