Dilatancy stabilises shear failure in rock

@article{Aben2021DilatancySS,
  title={Dilatancy stabilises shear failure in rock},
  author={Franciscus M. Aben and Nicolas Brantut},
  journal={Earth and Planetary Science Letters},
  year={2021}
}
  • F. Aben, N. Brantut
  • Published 25 January 2021
  • Geology
  • Earth and Planetary Science Letters

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References

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    Earth and Planetary Science Letters
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Earthquake instability occurs as a result of strength loss during sliding on a fault. It has been known for over 50 years that fault compaction or dilatancy may cause significant weakening or
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Aseismic crack growth upon activation of fault slip due to fluid injection may or may not lead to the nucleation of a dynamic rupture depending on in situ conditions, frictional properties of the
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Frictional slip is often accompanied by dilatancy due to uplift in sliding over asperities and micro-cracking in the adjacent material. If dilatancy occurs more rapidly than pore fluid can flow into
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[1] Pore fluid pressure plays an important role in the frictional strength and stability of tectonic faults. We report on laboratory measurements of porosity changes associated with transient
Dilatancy, compaction, and slip instability of a fluid‐infiltrated fault
We analyze the conditions for unstable slip of a fluid infiltrated fault using a rate and state dependent friction model including the effects of dilatancy and pore compaction. We postulate the
Dilatancy in hydraulically isolated faults and the suppression of instability
Laboratory studies have shown that consolidated fault gouge dilates in response to an increase in the rate of shearing. During the period of accelerating slip that characterizes the onset of an
Earthquake precursory effects due to pore fluid stabilization of a weakening fault zone
We report the analysis of two mechanisms by which pore fluids could partially stabilize the earthquake rupture process in natural rock masses. These mechanisms are based on dilatancy strengthening
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[1] The mechanics of slow slip events (SSE) in subduction zones remain unresolved. We suggest that SSE nucleate in areas of unstable friction under drained conditions, but as slip accelerates
Shear heating of a fluid‐saturated slip‐weakening dilatant fault zone 1. Limiting regimes
[1] The one-dimensional model of Rudnicki and Chen [1988] for a slip-weakening dilating fault is extended to include shear heating. Because inertia is not included, instability (a seismic event)
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