Abstract
The nonlinear rock behavior effects observed in loading diagrams are analyzed which are usually ignored in conventional models of elastoplastic media. The initial deformation stage and unloading of rock samples are considered. The nonlinear behavior on these loading stages is interpreted from the viewpoint of partial closure of cracks initiated during deformation beyond the elastic limit or in earlier loading history. Phenomenological relations are derived to account for the discussed nonlinear effects in numerical modeling. The postcritical deformation stage corresponding to the stage of strain localization and main crack formation is studied. Corrections are made to provide a more accurate determination of model parameters.
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References
Jaeger, J. C., Cook, N.G.W., and Zimmerman, R.W., Fundamentals of Rock Mechanics, Wiley-Blackwell Publ., 2007.
Stavrogin, A.N. and Tarasov, B.G., Experimental Phys ics and Rocks Mechanics: Results of Laboratory Studies, Lisse, Abingdon: A.A. Balkema, 2001.
Fairhurst, C., Laboratory Measurement of Some Physical Properties of Rock, in Mining Engineering Series, Rock Mechanics, Proc. 4th Symp. Rock Mech., Univ. Park, Pennsylvania, 1961, pp. 105–118.
Karev, V.I., Klimov, D.M., Kovalenko, Yu.F., and Ustinov, K.B., Fracture of Sedimentary Rocks under a Complex Triaxial Stress State, Mech. Solid., 2016, vol. 51, no. 5, pp. 526–552.
Zoback, M.D. and Byerlee, J.D., The Effect of Cyclic Differential Stress on Dilatancy in Westerly Granite under Uniaxial and Triaxial Conditions, J. Geophys. Res., 1975, vol. 80(11), pp. 1526–1530.
Zoback, M.D. and Byerlee, J.D., The Effect of Microcrack Dilatancy on the Permeability of Westerly Granite, J. Geophys. Res., 1975, vol. 80(5), pp. 752–755.
Makarov, P.V. and Eremin, M.O., Fracture Model of Brittle and Quasibrittle Materials and Geomedia, Phys. Mesomech., 2013, vol. 16, no. 3, pp. 207–226.
Panin, V.E., Egorushkin, V.E., Panin, A.V., and Chernyavskii, A.G., Plastic Distortion as a Fundamental Mechanism in Nonlinear Mesomechanics of Plastic Deformation and Fracture, Phys. Mesomech., 2016, vol. 19, no. 3, pp. 255–268.
Lehner, F.K. and Kachanov, M., On the Stress-Strain Relation for Cracked Elastic Materials in Compression, in Mechanics of Jointed and Faulted Rock, Rossmanith, H.P., Ed., Rotterdam: Vienna University of Technology, 1995, pp. 49–62.
Kachanov, M., On the Effective Elastic Properties of Cracked Solids——Editor’s Comments, Int. J. Fract. (Lett. Fract. Micromech.), 2007, vol. 146, pp. 295–299. doi 10.1007/s10704-007-9170-6
Nemat-Nasser, S. and Obata, M., A Microcrack Model of Dilatancy in Brittle Materials, Trans. ASME, 1988, vol. 55, pp. 24–36.
Brace, W.F., Paulding, B.W., Jr., and Scholz, C., Dilatancy in the Fracture of Crystalline Rocks, J. Geophys. Res., 1966, vol. 71, pp. 3939–3953.
Nikolaevskii, V.N., Governing Equations of Plastic Deformation of a Granular Medium, J. Appl. Math. Mech., 1971, vol. 35, no. 6, pp. 1017–1029.
Nikolaevskii, V.N., Proceedings, Geomechanics. Vol.1. Fracture and Dilatancy,Oil and Gas, Moscow-Izhevsk: SRC Regular and Chaotic Dynamics, Institute of Computer Research, 2010.
Kapustyanskii, S.M. and Nikolaevskii, V.N., Quantitative Formulation of the Elastic-Plastic Dilatancy Model, Mekh. Tv. Tela, 1984, no. 4, pp. 113–123.
Kapustyanskii, S.M., Nikolaevskii, V.N., and Zhilenkov, A.G., Nonholonomic Model of Deformation of a Highly Porous Sandstone under its Internal Crushing, Izv. Phys. Sol. Earth, 2010, vol. 46, no. 12, pp. 1095–1104.
Zamyshlyaev, B.V. and Yevterev, L.S., Models of Dynamic Deformation and Fracture of Soil Grounds, Moscow: Nauka, 1990.
Stefanov, Yu.P., Chertov, M.A., Aidagulov, G.R., and Myasnikov, A.V., Dynamics of Inelastic Deformation of Porous Rocks and Formation of Localized Compaction Zones Studied by Numerical Modeling, J. Mech. Phys. Solid., 2011, vol. 59, pp. 2323–2340.
Stefanov, Yu.P., Dilatancy and Compaction Modes in the Shear Zone, AIP Conf. Proc., 2014, vol. 1623, pp. 611–614.
Stefanov, Yu.P., Localization of Deformation and Fracture in Geomaterials. Numerical Simulation, Phys. Mesomech., 2002, vol. 5, no. 5–6, pp. 67–77.
Stefanov, Yu.P. and Bakeev, R.A., Formation of Flower Structures in a Geological Layer at a Strike-Slip Displacement in the Basement, Izv. Phys. Sol. Earth, 2015, vol. 51, no. 4, pp. 535–547.
Ambartsumyan, S.A., Multimodulus Elasticity Theory, Moscow: Nauka, 1982.
Lomakin, E.V. and Rabotnov, Yu.N., Relations of the Theory of Elasticity for an Isotropic Multimodulus Material, Izv. ANSSSR. MTT, 1978, no. 6, pp. 29–34.
Myasnikov, V.P. and Oleinikov, A.I., Fundamentals of the Mechanics of Heterogeneously Resistant Media, Vladivostok: Dal’nauka, 2007.
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Original Russian Text © Yu.P. Stefanov, 2016, published in Fizicheskaya Mezomekhanika, 2016, Vol. 19, No. 6, pp. 54–61.
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Stefanov, Y.P. Some Nonlinear Rock Behavior Effects. Phys Mesomech 21, 234–241 (2018). https://doi.org/10.1134/S1029959918030074
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DOI: https://doi.org/10.1134/S1029959918030074