Variation of the exponential and power law creep parameters with strain for Carrara marble deformed at 120° to 400°C

Details Variation of the exponential and power law creep parameters with strain for Carrara marble deformed at 120° to 400°C Variation of the exponential and power law creep parameters with strain for Carrara marble deformed at 120° to 400°C

Jun 2001

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001georl..28.2301c&link_type=abstract

Geophysical Research Letters, Volume 28, Issue 12, p. 2301-2304

Physics

1

Mineral Physics: Creep And Deformation, Physical Properties Of Rocks: Fracture And Flow, Physical Properties Of Rocks: Plasticity, Diffusion, And Creep, Tectonophysics: Dynamics Of Lithosphere And Mantle-General

Scientific paper

Reliable extrapolation of flow laws for geological materials from laboratory to natural conditions depends upon a sound micromechanical interpretation of the values of the material parameters in those flow laws. In practice, such interpretations require the experimentally determined values of the material parameters to be close to those applying during steady state deformation and/or at given material structure (mechanical state). Using an especially detailed mechanical data set for Carrara marble and a description of flow properties incorporating an explicit structure dependence, the variation of the constant strain and constant structure values of the material parameters in the exponential and power law creep equations is determined as a function of strain. The large variation that is observed underscores the need both for the acquisition of mechanical data to large strains and for further work investigating the structure dependence of flow properties, if flow law extrapolation is to be performed with confidence.

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