Abstract
The double-torsion test using Aji granite was carried out to investigate the interaction between stress-induced crack path and mineral grains. Crack velocities were controlled at range 10−7 m/s to 10−1 m/s. After the stressed specimens were dyed, we checked the crack path by thin section analysis, using an optical microscope. The stress-induced crack path was divided into two types, transgranular and intergranular cracks, and each path was subdivided with respect to mineral grains. In spite of the extensive range of crack velocities, the ratios between the transgranular and intergranular crack lengths did not change. The crack paths were all jagged, and often showed detour around the grain boundary when faced with obstacles like hard grains or preexisting cracks. That is to say, quartz grain played an important role as an obstacle. Feldspar grain could change the crack path because of its cleavage plane. Biolite grain had a serious effect on the path even if its constitution ratio is very small. Fractal dimensions of the crack paths were calculated by three methods, as indicators of surface roughness. The fractal dimensions were shown in a slight trend with the change of crack velocity. This trend can be explained from the point of limited cracking rate in stress corrosion.
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References
Anderson, O. L., andGrew, P. C. (1977),Stress Corrosion Theory of Crack Propagation with Applications to Geophysics, Rev. Geophys. Space Phys.15, 77–104.
Atkinson, B. K., andMeredith, P. G.,Experimental fracture mechanics data for rocks and minerals. InFracture Mechanics of Rock (ed. Atkinson, B. K.) (Academic Press, London 1987) pp. 477–525.
Brace, W. F., Silver, E., Hadley, K., andGetze, C. (1972),Cracks and Pores: A Closer Look, Science178, 126–163.
Brown, S. R., andScholz, C. H. (1985),Broad Bandwidth Study of the Topography of Natural Rock Surfaces, J. Geophys. Res.90 (B14), 12,575–12,582.
Cooley, J. W., andTurkey, J. W. (1965),An Algorithm for the Machine Calculation of Complex Fourier Series, Math. Compt.19 (90), 297–301.
Dale, T. N. (1923),The Commercial Granite of New England, Bull. U. S. Geol. Surv.738, 22–103.
Evans, A. G. (1972),A Method for Evaluating the Time-dependent Failure Characteristics of Brittle Materials and its Application to Polycrystalline Alumina, J. Mater. Sci.7, 1137–1146.
Fredrich, J. T., andWong, T.-F. (1986),Micromechanics of Thermally Induced Cracking in Three Crustal Rocks, J. Geophys. Res.91 (B12), 743–764.
Hoagland, R. G., Hahn, G. T., andRosenfield, A. R. (1973),Influence of Microstructure on Fracture Propagation in Rock, Rock Mech.5, 77–106.
Kranz, R. L. (1983),Microcracks in Rocks: A Review, Tectonophys.100, 449–480.
Kudo, Y., Hashimoto, K., Sano, O., andNakagawa, K.,Relation between Physical Anisotropy and Microstructures of Granitic Rocks in Japan, Proc. of the 6th Int. Congress on Rock Mech., Montreal (eds. Herget, G., and Vongpaisal, S.) (A. A. Balkema, Rotterdam 1987) pp. 429–432.
Kudo, Y., Yamamoto, H., Sano, O., andNakagawa, K. (1989),Relation between Fabric Anisotropy and Physical Anisotropy in Westerly Granite (in Japanese with English Abstract), Proc. of the 21st Symposium on Rock Mechanics (Japan), 451–455.
Lawn, B. R., andWilshaw, T. R.,Fracture of Brittle Solids (Cambridge Univ. Press, Cambridge 1975), 204 pp.
Mandelbrot, B. B.,The Fractal Geometry of Nature (W. H. Freeman, San Francisco, Calif. 1983) 468 pp.
Nur, A., andSimmons, G. (1970),The Origin of Small Cracks in Igneous Rocks, Int. J. Rock. Mech. Min. Sci.18, 53–59.
Ouchterlony, F. (1980),Review of Fracture Toughness Testing of Rock, SveDeFo Report,DS 1980:15, 80 pp.
Peng, S., andJohnson, A. M. (1972),Crack Growth and Faulting in Cylindrical Specimens of Chelmsford Granite, Int. J. Rock Mech. Min. Sci.9, 40–41.
Richter, D., andSimmons, G.,Microcracks in crustal igneous rocks; Microscopy. InThe Earth's Crust (ed. Heacock, J. G.) (Am. Geophys. Union, Geophys. Monogr.20, 1977) pp. 149–180.
Sano, O. (1988),A Revision of the Double-torsion Technique for Brittle Materials, J. Mat. Sci.23, 2505–2511.
Sano, O., Kudo, Y., andMizuta, Y. (1990),Experimental Determination of Elastic Constants of Oshima Granite, Barre Granite, and Chelmsford Granite, J. Geophys. Res. (in press).
Sih, G. C.,Dynamic aspects of crack propagation. InInelastic Behavior of Solids (eds. Kanninen, M. F., Adler, W. F., Rosenfield A. R., and Jaffee, R. I.) (McGraw-Hill, New York 1970) pp. 607–638.
Sprunt, E., andBrace, W. F. (1974),Direct Observation of Microcavities in Crystalline Rocks, Int. J. Rock Mech. Min. Sci.11, 139–150.
Svab, M., andLajtai, E. Z. (1982),Microstructural Control of Crack Growth in Lac du Bonnet Granite, Proc. of the 5th Canadian Fracture Conference, 219–228.
Swanson, P. L. (1985),Subcritical Fracture Propagation in Rocks: An Examination Using the Methods of Fracture Mechanics and Nondestructive Testing, Ph.D. Thesis, University of Colorado.
Tapponnier, P., andBrace, W. F. (1976),Development of Stress-induced Microcracks in Westerly Granite, Int. J. Rock Min. Sci.13, 103–112.
Tarr, R. S. (1891),The Phenomena of Rifting in Granite, Am. J. Sci., 3rd ser.41, 267–272.
Wiederhorn, S. M.,Fracture of ceramics. InMechanical and Thermal Properties of Ceramics (ed. Wachtman, J. B., Jr.) (NBS Spec. Publ.303, 1969) pp. 217–241.
Willard, R. J., andMcWilliams, J. R. (1969),Microstructural Techniques in the Study of Physical Properties of Rock, Int. J. Rock Mech. Min. Sci.6, 1–12.
Wu, C. Cm., Freiman, S. W., Rice, R. W., andMecholsky, J. J. (1978),Microstructural Aspects of Crack Propagation in Ceramics, J. Mat. Sci.13, 2659–2670.
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Kudo, Y., Sano, O., Murashige, N. et al. Stress-induced crack path in Aji granite under tensile stress. PAGEOPH 138, 641–656 (1992). https://doi.org/10.1007/BF00876342
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DOI: https://doi.org/10.1007/BF00876342