Micromechanics-Based Permeability Evolution in Brittle Materials at High Strain Rates

We develop a micromechanics-based permeability evolution model for brittle materials at high strain rates ( ≥ 100  s - 1 ). Extending for undrained deformation the mechanical constitutive description of brittle solids, whose constitutive response is governed by micro-cracks, we now relate the damage...

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Bibliographic Details
Published inPure and applied geophysics Vol. 173; no. 8; pp. 2857 - 2868
Main Authors Perol, Thibaut, Bhat, Harsha S.
Format Journal Article
LanguageEnglish
Published Cham Springer International Publishing 01.08.2016
Springer Nature B.V
Springer Verlag
Subjects
Apertures
Brittle materials
Earth and Environmental Science
Earth Sciences
Earthquakes
Evolution
Geophysics/Geodesy
High strain rate
Materials science
Mathematical models
Mechanics
Microcracks
Permeability
Pore pressure
Sciences of the Universe
Seismic activity
Seismic response
Strain
Micromechanics
poroelasticity
permeability
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Summary:We develop a micromechanics-based permeability evolution model for brittle materials at high strain rates ( ≥ 100  s - 1 ). Extending for undrained deformation the mechanical constitutive description of brittle solids, whose constitutive response is governed by micro-cracks, we now relate the damage-induced strains to micro-crack aperture. We then use an existing permeability model to evaluate the permeability evolution. This model predicts both the percolative and connected regime of permeability evolution of Westerly Granite during triaxial loading at high strain rate. This model can simulate pore pressure history during earthquake coseismic dynamic ruptures under undrained conditions.
Bibliography:ObjectType-Article-1
SourceType-Scholarly Journals-1
ObjectType-Feature-2
content type line 23
ISSN:0033-4553
1420-9136
DOI:10.1007/s00024-016-1354-4