Experimental and Numerical Studies on Development of Fracture Process Zone (FPZ) in Rocks under Cyclic and Static Loadings

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• 作者：M. Ghamgosar ; N. Erarslan
• 关键词：FPZ ; Subcritical crack propagation ; Rock fracture toughness ; CCNBD ; CT scan ; SEM
• 刊名：Rock Mechanics and Rock Engineering
• 出版年：2016
• 出版时间：March 2016
• 年：2016
• 卷：49
• 期：3
• 页码：893-908
• 全文大小：11,525 KB
• 参考文献：Anderson TL (2005) Fracture mechanics: fundamentals and applications, CRC press
  Atkinson BK (1984) Subcritical crack growth in geological materials. J Geophys Res Solid Earth (1978–2012) 89:4077–4114CrossRef
  Atkinson BK, Avdis V (1980) Fracture mechanics parameters of some rock-forming minerals determined using an indentation technique. Int J Rock Mech Min Sci 17:383–386CrossRef
  Costin L, Holcomb D (1981) Time-dependent failure of rock under cyclic loading. Tectonophysics 79:279–296CrossRef
  Eberhardt E, Stead D, Stimpson B, Read R (1998) Identifying crack initiation and propagation thresholds in brittle rock. Can Geotech J 35:222–233CrossRef
  Erarslan N, Williams D (2012) Mechanism of rock fatigue damage in terms of fracturing modes. Int J Fatigue 43:76–89CrossRef
  Evans A (1972) A method for evaluating the time-dependent failure characteristics of brittle materials—and its application to polycrystalline alumina. J Mater Sci 7:1137–1146CrossRef
  Evans A (1974) Slow crack growth in brittle materials under dynamic loading conditions. Int J Fract 10:251–259CrossRef
  Evans A, Fuller E (1974) Crack propagation in ceramic materials under cyclic loading conditions. Metall Trans 5:27–33
  Fairhurst C (1971) Fundamental considerations relating to the strength of rock. In: Colloquium on rock fracture, Ruhr University, Bochum, Germany, Veröff. Inst. Bodenmechanik und Felsmechanik (Karlsruhe), vol 55, pp 1–56
  Fowell R, Xu C (1994) The use of the cracked Brazilian disc geometry for rock fracture investigations. International Journal of Rock Mechanics and Mining Sciences & Geomechanics Abstracts. Elsevier, pp 571–579
  Fowell RJ, Hudson JA, Xu C, Chen JF, Zhao X (1995) Suggested method for determining mode I fracture toughness using cracked chevron notched Brazilian disc (CCNBD) specimens. Int J Rock Mech Min Sci Geomech Abstr 32(1):57–64CrossRef
  Franklin JA, Zongqi S, Atkinson BK, Meredith PC, Rummel F, Mueller W, Nishimatsu Y, Takahahsi H, Costin LS, Ingraffea AR, Bobrov GF (1988) Suggested methods for determining the fracture toughness of rock. Int J Rock Mech Min Sci Geomech Abstr 25:71–96
  Ghamgosar M, Erarslan N, Williams D (2014) Assessment of rock mechanics parameters for improved waste disposal management and containment. The 7th International Congress on Environmental Geotechnics Melbourne
  Ghamgosar M, Erarslan N, Williams D (2014) In Press. Multiple factorial analysis of rock fragmentation under various cyclic loading conditions. ISRM 13th International Congress on Rock Mechanics
  Giner E, Sukumar N, Tarancón JE, Fuenmayor FJ (2009) An Abaqus implementation of the extended finite element method. Eng Fract Mech 76:347–368CrossRef
  Griffith A (1920) VI The Phenomena of rupture and flow in solids. Phil Trans Roy Soc (Lon) A 221:163–198
  Gross D, Seelig T (2011) Fracture mechanics: with an introduction to micromechanics, Springer
  Hillerborg A, Modéer M, Petersson PE (1976) Analysis of crack formation and crack growth in concrete by means of fracture mechanics and finite elements. Cem Concr Res 6:773–781CrossRef
  Horii H, Nemat-Nasser S (1985) Compression-induced microcrack growth in brittle solids: axial splitting and shear failure. J Geophys Res Solid Earth (1978–2012) 90:3105–3125CrossRef
  Horii H, Nemat-Nasser S (1986) Brittle failure in compression: splitting, faulting and brittle-ductile transition. Philosophical Transactions for the Royal Society of London. Series A, Mathematical and Physical Sciences, pp 337–374
  Labuz J, Shah S, Dowding C (1987) The fracture process zone in granite: evidence and effect. International Journal of Rock Mechanics and Mining Sciences & Geomechanics Abstracts. Elsevier, pp 235–246
  Maji A, Wang J (1992) Experimental study of fracture processes in rock. Rock Mech Rock Eng 25:25–47CrossRef
  Mindess S (1984) The effect of specimen size on the fracture energy of concrete. Cem Concr Res 14:431–436CrossRef
  Ouchterlony F (1980) Review of fracture toughness testing of rock. SveDeFo, Stiftelsen Svensk Detonikforskning, pp 145–159
  Schmidt RA (1980) A microcrack model and its significance to hydraulic fracturing and fracture toughness testing. The 21st US Symposium on Rock Mechanics (USRMS). American Rock Mechanics Association
  Schmidt R, Lutz T (1979) K Ic and J Ic of Westerly granite—effects of thickness and in-plane dimensions. Fract Mech Appl Brittle Mater ASTM STP 678:166–182CrossRef
  Sih GC (1977) Mechanics of Fracture: elastodynamic crack problems, vol 4. Noordhoff International Publishing, Leyden, pp 50–60
  Spyropoulos C, Griffith WJ, Scholz CH, Shaw BE (1999) Experimental evidence for different strain regimes of crack populations in a clay model. Geophys Res Lett 26:1081–1084CrossRef
  Tang C-A, Yang Y-F (2012) Crack branching mechanism of rock-like quasi
  ittle materials under dynamic stress. J Cent South Univ 19:3273–3284CrossRef
  Wang QZ, Jia XM, Kou SQ, Zhang ZX, Lindqvist PA (2004) The flattened Brazilian disc specimen used for testing elastic modulus, tensile strength and fracture toughness of brittle rocks; analytical and numerical results. Int J Rock Mech Min Sci (1997) 41:245–253CrossRef
  Whittaker BN, Singh RN, Sun G (1992) Rock fracture mechanics: principles, design, and applications, vol 71. Elsevier, Amsterdam, New York, pp 81–110
  
• 作者单位：M. Ghamgosar (1)
  N. Erarslan (1) (2)
  
  1. The University of Queensland, School of Civil Engineering, St Lucia, Brisbane, QLD, 4072, Australia
  2. Adana Science and Technology University, Mining and Mineral Processing Engineering, Adana, Turkey
  
• 刊物类别：Earth and Environmental Science
• 刊物主题：Earth sciences
  Geophysics and Geodesy
  Civil Engineering
  
• 出版者：Springer Wien
• ISSN：1434-453X

文摘

The development of fracture process zones (FPZ) in the Cracked Chevron Notched Brazilian Disc (CCNBD) monsonite and Brisbane tuff specimens was investigated to evaluate the mechanical behaviour of brittle rocks under static and various cyclic loadings. An FPZ is a region that involves different types of damage around the pre-existing and/or stress-induced crack tips in engineering materials. This highly damaged area includes micro- and meso-cracks, which emerge prior to the main fracture growth or extension and ultimately coalescence to macrofractures, leading to the failure. The experiments and numerical simulations were designed for this study to investigate the following features of FPZ in rocks: (1) ligament connections and (2) microcracking and its coalescence in FPZ. A Computed Tomography (CT) scan technique was also used to investigate the FPZ behaviour in selected rock specimens. The CT scan results showed that the fracturing velocity is entirely dependent on the appropriate amount of fracture energy absorbed in rock specimens due to the change of frequency and amplitudes of the dynamic loading. Extended Finite Element Method (XFEM) was used to compute the displacements, tensile stress distribution and plastic energy dissipation around the propagating crack tip in FPZ. One of the most important observations, the shape of FPZ and its extension around the crack tip, was made using numerical and experimental results, which supported the CT scan results. When the static rupture and the cyclic rupture were compared, the main differences are twofold: (1) the number of fragments produced is much greater under cyclic loading than under static loading, and (2) intergranular cracks are formed due to particle breakage under cyclic loading compared with smooth and bright cracks along cleavage planes under static loading.