Physics – Geophysics
Scientific paper
May 2006
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006georl..3310311k&link_type=abstract
Geophysical Research Letters, Volume 33, Issue 10, CiteID L10311
Physics
Geophysics
4
Mathematical Geophysics: Numerical Approximations And Analysis (4260), Mineral Physics: Defects, Nonlinear Geophysics: Nonlinear Differential Equations, Physical Properties Of Rocks: Plasticity, Diffusion, And Creep, Structural Geology: Mechanics, Theory, And Modeling
Scientific paper
Porous rocks, subjected to compressive stress, often undergo mechanical compaction via grain crushing and rearrangement, and chemical compaction via pressure solution. The compaction leads to irreversible volume reduction that spontaneously localizes into elongated features under some conditions. This work presents an analytical solution for the stress around a 2D compaction band (CB), using the ``transformation problem'' introduced by Eshelby (1957). The analytical solution is shown to agree with results from a new version of a Spring Network Model for simulating mechanical and chemical compaction. The similarity of the stress fields around CBs and edge-dislocations is shown and is such that one may describe CBs as anti-dislocations.
Aharonov Einat
Katsman Regina
Scher Harvey
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