Crossref journal-article
American Geophysical Union (AGU)
Geophysical Research Letters (13)
Abstract

Room temperature friction experiments on quartzo‐feldspathic rocks obey a velocity dependence of strength which consists of two opposite‐sensed effects. The second of these effects has a negative velocity dependence and evolves over a characteristic displacement. This evolution effect was originally attributed by Dieterich [1978; 1979] to an underlying time‐dependent process but is often described by either of two empirical evolution laws. One depends explicitly on displacement (slip law) and the other retains time dependence (slowness law). The slip law is favored in representing behavior around steady‐state as seen in velocity stepping experiments. However, in this study slide‐hold‐slide tests conducted at different machine stiffnesses show that the evolution effect depends on time, not slip. For the slowness law the coefficient of time‐dependent strengthening b is measured directly in slide‐hold‐slide tests. Existing empirical evolution laws may not be sufficient to describe both near steady‐state and non steady‐state behavior. Provided a more correct form can be found, time‐dependent evolution may improve frictional models of the seismic cycle by reducing the amount of inter‐seismic slip.

Bibliography

Beeler, N. M., Tullis, T. E., & Weeks, J. D. (1994). The roles of time and displacement in the evolution effect in rock friction. Geophysical Research Letters, 21(18), 1987–1990. Portico.

Authors 3
  1. N. M. Beeler (first)
  2. T. E. Tullis (additional)
  3. J. D. Weeks (additional)
References 11 Referenced 274
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Dates
Type When
Created 21 years, 7 months ago (Feb. 3, 2004, 10:32 p.m.)
Deposited 1 year, 9 months ago (Nov. 22, 2023, 11:51 a.m.)
Indexed 1 month ago (Aug. 5, 2025, 8:56 a.m.)
Issued 31 years ago (Sept. 1, 1994)
Published 31 years ago (Sept. 1, 1994)
Published Online 12 years, 9 months ago (Dec. 7, 2012)
Published Print 31 years ago (Sept. 1, 1994)
Funders 0

None

@article{Beeler_1994, title={The roles of time and displacement in the evolution effect in rock friction}, volume={21}, ISSN={1944-8007}, url={http://dx.doi.org/10.1029/94gl01599}, DOI={10.1029/94gl01599}, number={18}, journal={Geophysical Research Letters}, publisher={American Geophysical Union (AGU)}, author={Beeler, N. M. and Tullis, T. E. and Weeks, J. D.}, year={1994}, month=sep, pages={1987–1990} }