Mechanical Behavior of Brittle Rock-Like Specimens with Pre-existing Fissures Under Uniaxial Loading: Experimental Studies and Particle Mechanics Approach
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- 作者：Ri-hong Cao ; Ping Cao ; Hang Lin ; Cheng-zhi Pu ; Ke Ou
- 关键词：Multi ; fissure ; Rock ; like material ; PFC2D ; Peak strength ; Failure mode ; Uniaxial compression
- 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：763-783
- 全文大小：6,961 KB
- 参考文献：Bahaaddini M, Sharrock G, Hebblewhite BK (2013) Numerical investigation of the effect of joint geometrical parameters on the mechanical properties of a non-persistent jointed rock mass under uniaxial compression. Comput Geotech 49:206–225CrossRef
Bobet A, Einstein HH (1998a) Fracture coalescence in rock-type materials under uniaxial and biaxial compression. Int J Rock Mech Min Sci 35(7):863–888CrossRef
Bobet A, Einstein HH (1998b) Numerical modeling of fracture coalescence in a model rock material. Int J Fract 92(3):221–252CrossRef
Bombolakis EG (1968) Photoelastic study of initial stages of brittle fracture in compression. Tectonophysics 6(6):461–473CrossRef
Camones LAM, do Amaral Vargas Jr E, de Figueiredo RP (2013) Application of the discrete element method for modeling of rock crack propagation and coalescence in the step-path failure mechanism. Eng Geol 153(8):80–94
Cao Ping, Liu Taoying, Chengzhi Pu, Lin Hang (2015) Crack propagation and coalescence of brittle rock-like specimens with pre-existing cracks in compression. Eng Geol 187(17):113–121CrossRef
Chen W, Konietzky H (2014) Simulation of heterogeneity, creep, damage and lifetime for loaded brittle rocks. Tectonophysics 633(21):164–175
Cho N, Martin CD, Sego DC (2007) A clumped particle model for rock. Int J Rock Mech Min Sci 44(7):997–1010CrossRef
Dyskin AV, Sahouryeh E, Jewell RJ (2003) Influence of shape and locations of initial 3-D cracks on their growth in uniaxial compression. Eng Fract Mech 70(15):2115–2136CrossRef
Erdogan F, Sih GC (1963) On the crack extension path in plates under plane loading and transverse shear. ASME J Basic Eng 85D:519–527CrossRef
Fan X, Kulatilake PHSW, Chen X (2015) Mechanical behavior of rock-like jointed blocks with multi-non-persistent joints under uniaxial loading: a particle mechanics approach. Eng Geol 190(14):17–32CrossRef
Hoek E, Bieniawski ZT (1965) Brittle fracture propagation in rock under compression. Int J Fract 1(3):137–155CrossRef
Hussian MA, Pu EL, Underwood JH (1974) Strain energy release rate for a crack under combined mode I and mode II. Fracture Analysis 560(1):2–28
Itasca Consulting Group (2004) PFC2D user’s manual, version 3.1. Minnesota, USA, Minneapolis
Lee H, Jeon S (2011) An experimental and numerical study of fracture coalescence in pre-cracked specimens under uniaxial compression. Int J Solids Struct 48(6):979–999CrossRef
Li YP, Chen LZ, Wang YH (2005) Experimental research on pre-cracked marble under compression. Int J Solids Struct 42(9/10):2505–2516CrossRef
Manouchehrian A, Sharifzadeh M, Marji MF, Gholamnejad J (2014) A bonded particle model for analysis of the flaw orientation effect on crack propagation mechanism in brittle materials under compression. Arch Civ Mech Eng 14(1):40–52CrossRef
Miller JT, Einstein HH (2008) Crack coalescence tests on granite. In: Proceedings of 42nd US Rock Mechanics Symposium, ARMA 08–162, San Francisco
Mughieda O, Alzo’ubi AK (2004) Fracture mechanisms of offset rock joints: a laboratory investigation. Geotech Geol Eng 22(4):545–562CrossRef
Park NS (2001) Crack propagation and coalescence in rock under uniaxial compression. Master’s Thesis, Seoul National University
Park CH, Bobet A (2009) Crack coalescence in specimens with open and closed flaws: a comparison. Int J Rock Mech Min Sci 46(5):819–829CrossRef
Park CH, Bobet A (2010) Crack initiation, propagation and coalescence from frictional flaws in uniaxial compression. Eng Fract Mech 77(14):2727–2748CrossRef
Potyondy DO (2007) Simulating stress corrosion with a bonded-particle model for rock. Int J Rock Mech Min Sci 44(5):677–691CrossRef
Potyondy DO, Cundall PA (2004) A bonded-particle model for rock. Int J Rock Mech Min Sci 41(8):1329–1364CrossRef
Reyes O, Einstein HH (1991) Failure mechanisms of fractured rock—a fracture coalescence model. In: Proceedings of 7th Congress of the ISRM, Aachen, Germany, pp:333–340
Sagong M, Bobet A (2002) Coalescence of multiple flaws in a rock-model material in uniaxial compression. Int J Rock Mech Min Sci 39(2):229–241CrossRef
Sahouryeh E, Dyskin AV, Germanovich LN (2002) Crack growth under biaxial compression. Eng Fract Mech 69(18):2187–2198CrossRef
Shen B (1995) The mechanism of fracture coalescence in compression––experimental study and numerical simulation. Eng Fract Mech 51(1):73–85CrossRef
Sih GC (1974) Strain–energy–density factor applied to mixed mode crack problems. Int J Fract 10(3):305–321CrossRef
Tang CA, Lin P, Wong RHC, Chau KT (2001) Analysis of crack coalescence in rock-like materials containing three flaws—Part II: numerical approach. Int J Rock Mech Min Sci 38(7):925–939CrossRef
Vesga LF, Vallejo LE, Lobo-Guerrero S (2008) DEM analysis of the crack propagation in brittle clays under uniaxial compression tests. Int J Numer Anal Meth Geomech 32(11):1405–1415CrossRef
Wang R, Zhao Y, Chen Y, Yan H, Yin YQ, Yao CY, Zhang H (1987) Experimental and finite simulation of X-shear fractures from a crack in marble. Tectonophysics 144(1–3):141–150CrossRef
Wong RHC, Chau KT (1998) Crack coalescence in a rock-like material containing two cracks. Int J Rock Mech Min Sci 35(2):147–164CrossRef
Wong LNY, Einstein HNY (2006) Fracturing behavior of prismatic specimens containing single flaws. In: Golden Rocks 2006, the 41st US Symposium on Rock Mechanics (USRMS)
Wong LNY, Einstein HH (2009a) Crack coalescence in molded gypsum and Carrara marble: Part 1. Macroscopic observations and interpretation. Rock Mech Rock Eng 42(3):475–511CrossRef
Wong LNY, Einstein HH (2009b) Crack coalescence in molded gypsum and Carrara marble: Part 2. Microscopic observations and interpretation. Rock Mech Rock Eng 42(3):513–545CrossRef
Wong LNY, Zhang XP (2014) Size effects on cracking behavior of flaw-containing specimens under compressive loading. Rock Mech Rock Eng 47(5):1921–1930CrossRef
Wong RHC, Chau KT, Tang CA, Lin P (2001) Analysis of crack coalescence in rock-like materials containing three flaws–Part I: experimental approach. Int J Rock Mech Min Sci 38(7):909–924CrossRef
Yang SQ, Yang DS, Jing HW, Li YH, Wang SY (2012) An experimental study of the fracture coalescence behaviour of brittle sandstone specimens containing three fissures. Rock Mech Rock Eng 45(4):563–582CrossRef
Yang S-Q, Huang Y-H, Jing H-W, Liu X-R (2014) Discrete element modeling on fracture coalescence behavior of red sandstone containing two unparallel fissures under uniaxial compression. Eng Geol 178(21):28–48CrossRef
Zhang X-P, Wong LNY (2012) Cracking processes in rock-like material containing a single flaw under uniaxial compression: a numerical study based on parallel bonded-particle model approach. Rock Mech Rock Eng 45(5):711–737 - 作者单位：Ri-hong Cao (1)
Ping Cao (1)
Hang Lin (1)
Cheng-zhi Pu (1)
Ke Ou (1)
1. School of Resources and Safety Engineering, Central South University, Changsha, 410083, Hunan, China - 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
Joints and fissures with similar orientation or characteristics are common in natural rocks; the inclination and density of the fissures affect the mechanical properties and failure mechanism of the rock mass. However, the strength, crack coalescence pattern, and failure mode of rock specimens containing multi-fissures have not been studied comprehensively. In this paper, combining similar material testing and discrete element numerical method (PFC2D), the peak strength and failure characteristics of rock-like materials with multi-fissures are explored. Rock-like specimens were made of cement and sand and pre-existing fissures created by inserting steel shims into cement mortar paste and removing them during curing. The peak strength of multi-fissure specimens depends on the fissure angle α (which is measured counterclockwise from horizontal) and fissure number (N f). Under uniaxial compressional loading, the peak strength increased with increasing α. The material strength was lowest for α = 25°, and highest for α = 90°. The influence of N f on the peak strength depended on α. For α = 25° and 45°, N f had a strong effect on the peak strength, while for higher α values, especially for the 90° sample, there were no obvious changes in peak strength with different N f. Under uniaxial compression, the coalescence modes between the fissures can be classified into three categories: S-mode, T-mode, and M-mode. Moreover, the failure mode can be classified into four categories: mixed failure, shear failure, stepped path failure, and intact failure. The failure mode of the specimen depends on α and N f. The peak strength and failure modes in the numerically simulated and experimental results are in good agreement.