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pure and applied geophysics

, Volume 124, Issue 4–5, pp 677–692 | Cite as

Slow crack growth in minerals and rocks: Theory and experiments

  • M. Darot
  • Y. Gueguen
Article

Abstract

Strength and mechanical behavior of rocks and minerals are modified by aqueous environments. This results in two effects: mechanical and chemical. The chemical effect is investigated from both a theoretical and an experimental point of view. It is shown that a thermodynamic approach leads to a satisfactory understanding of the chemical effect through an ‘extended griffith concept’. Predictions of the model have been tested using slow crack growth experiments. The experiments have been performed with a special Double Torsion apparatus which was built for this purpose. The good agreement observed between theory and experiments suggests that subcritical crack growth in rocks is controlled by adsorption onto the crack tip. This result was previously suggested by other authors (Dunninget al., 1984). However, the important consequences of the model are that (1) there should exist a threshold stress below which subcritical crack growth stops, and this threshold depends on the environment; (2) subcritical crack growth and time-dependent phenomena could take place in the crust in a stress interval which could be as high as 50% of the rupture stress.

Key words

Stress corrosion surface energy adsorption double torsion quartz 

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References

  1. Atkinson, B. K. (1984),Subcritical crack growth in geological materials. J. Geophys. Res.89, B6, 4077–4114.Google Scholar
  2. Darot, M., Reuschlé, Th. andGuegen, Y. (1985a),Fracture parameter of Fontainebleau sandstones: experimental study using a high temperature controlled atmosphere Double Torsion apparatus. Research and Engineering Applications in Rock Masses, Ashworth Ed. (Belkema Rotterdam)Google Scholar
  3. Darot, M., Gueguen, Y., Benchemam, Z. andGaboriaud, R. (1985b),Ductile fragile transition investigated by microindentation: results for quartz and olivine. Phys. Earth and Planet. Inter., 40, 180–186.Google Scholar
  4. Dunning, J. D., Petrovski, D., Schuyler, J. andOwens, A. (1984),The effect of aqueous chemical environments on crack propagation in quartz. J. Geophys. Res.89, B6, 4115–4123.Google Scholar
  5. Dunning, J. D., Lewis, W. L. andDurr, D. E. (1980),Chemomechanical weakening in the presence of surfactants. J. Geophys. Res.85, B10, 5344–5354.Google Scholar
  6. Dunning, J. D. andHuf, W. L. (1983),The effect of aqueous chemical environments on crack and hydraulic fracture propagation and morphologies. J. Geophys. Res.88, B8, 6491–6499.Google Scholar
  7. Ishido, T. andNishizawa, O. (1984),Effects of the Zeta potential on microcrack growth in rock under relatively low uniaxial compression. J. Geophys. Res.89, B6, 4153–4160.Google Scholar
  8. Lawn, B. R. andWilshaw, T. R. (1975),Fracture of Brittle Solids (Cambridge University Press), 204pp.Google Scholar
  9. Martin, R. andDurham, W. (1975),Mechanisms of crack growth in quartz, J. Geophys. Res.80, 4837–4844.Google Scholar
  10. Maugis, D. (1985),Subcritical crack growth, surface energy and fracture toughness of brittle materials, Fracture Mechanics of ceramics, 7, Brodt, Evans, Hassalman and Lange, Eds. (Plenum Press).Google Scholar
  11. Michalske, T. A. andFreiman, S. W. (1982),A molecular interpretation of stress corrosion in silica. Nature295, 511–512.Google Scholar
  12. O'Keefe, M. andNavrotsky, A.,Structure and Bonding in Crystals (I). (Academic Press New York, 1981), 357pp.Google Scholar
  13. Parks, G. A. (1984),Surface and interfacial free energies of quartz. J. Geophys. Res.89, B6, 3997–4008.Google Scholar
  14. Peck, L., Nolen-Hoeksema, R. C., Barton, C. C. andGordon, R. B. (1985),Measurement of the resistance of imperfectly elastic rock to the propagation of tensile cracks. J. Geophys. Res.90, B9, 7827–7836.Google Scholar
  15. Pletka, B. J. Fuller, Jr.,B. J. andKoepke, B. G. (1979),An evaluation of Double-Torison testing—Experimental fracture mechanics applied to brittle materials. Rep. ASTM STP 678, 19–37, Am. Soc. for Test. and Mater, Philadelphia, Pa.Google Scholar
  16. Rice, J. R. (1978),Thermodynamics of the quasi-static growth of Griffith cracks. J. Mech. Phys. Solids26, 61–78.Google Scholar
  17. Swalin, R. A.,Thermodynamics of Solids (Wiley, 1972), 387pp.Google Scholar
  18. Swanson, P. L. (1984),Subcritical growth and other time-and environment-dependent behaviour in crustal rocks. J. Geophys. Res.89, 4137–4152.Google Scholar

Copyright information

© Birkhäuser Verlag 1986

Authors and Affiliations

  • M. Darot
    • 1
  • Y. Gueguen
    • 1
  1. 1.Institut de Physique du GlobeStrasbourg CedexFrance

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