Physics
Scientific paper
Feb 2006
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006georl..3303308k&link_type=abstract
Geophysical Research Letters, Volume 33, Issue 3, CiteID L03308
Physics
Physical Properties Of Rocks: Fracture And Flow, Physical Properties Of Rocks: Permeability And Porosity, Structural Geology: Mechanics, Theory, And Modeling, Structural Geology: Dynamics And Mechanics Of Faulting (8118), Tectonophysics: Rheology: Crust And Lithosphere (8031)
Scientific paper
Laboratory results on granular media have lead to fundamental theoretical developments (such as poroelasticity, rate- and state-variable friction) that have found widespread application. This paper presents results from laboratory experiments that help constrain and combine these theories. Data from triaxial deformation experiments on quartz sand aggregates are used to illustrate stress-dependent behavior of poroelastic parameters (e.g., the Biot-Willis coefficient). The results from both volumetric compaction and frictional shear experiments are well described by poroelasticity as well as rate- and state-variable friction. The combination of these constitutive relations may provide a powerful tool that can be used in numerical models that couple mechanical, hydraulic, and temporal processes in the descriptions of granular deformation.
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