In this chapter, we use PFC2D to carry out numerical simulation for red sandstone containing two unparallel fissures under uniaxial compression (Yang et al. in Eng Geol 178:28–48, 2014). Compared with other numerical softwares (SAP2000 and X-FEM, et al.), PFC2D code can better simulate the crack coalescence behavior of rock material by assembly of rigid circular particles bonded together at their contact points. First, the numerical micro-parameters of red sandstone are calibrated from the experimental results of intact specimen by the method of trial and error. Then, systematic numerical simulation is performed for red sandstone containing two unparallel fissures under uniaxial compression by comparing quantitatively the numerical results with the experimental results. According to the simulated cracking process during the entire deformation, some significant features on the cracking characteristics are summarized. Finally, the stress field in red sandstone containing two unparallel fissures under uniaxial compression is analyzed in detail.
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Camones LAM, Vargas Jr EDA, de Figueiredo RP, Velloso RQ (2013) Application of the discrete element method for modeling of rock crack propagation and coalescence in the step-path failure mechanism. Eng Geol 153:80–94
CrossRef
Cho N, Martin CD, Sego DC (2007) A clumped particle model for rock. Int J Rock Mech Min Sci 44(7):997–1010
CrossRef
Debecker B, Vervoort A (2013) Two-dimensional discrete element simulations of the fracture behavior of slate. Int J Rock Mech Min Sci 61:161–170
Eberhardt E, Stead D, Stimpson B, Read RS (1998) Identifying crack initiation and propagation thresholds in brittle rock. Can Geotech J 35(2):222–233
CrossRef
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):979–999
CrossRef
Potyondy DO, Cundall PA (2004) A bonded-particle model for rock. Int J Rock Mech Min Sci 41(8):1329–1364
CrossRef
Yang SQ, Jing HW, Wang SY (2012) Experimental investigation on the strength, deformability, failure behavior and acoustic emission locations of red sandstone under triaxial compression. Rock Mech Rock Eng 45(4):583–606
CrossRef
Yang SQ, Liu XR, Jing HW (2013) Experimental investigation on fracture coalescence behavior of red sandstone containing two unparallel fissures under uniaxial compression. Int J Rock Mech Min Sci 63:82–92
Yang SQ, Huang YH, Jing HW, Liu XR (2014) Discrete element modeling on fracture coalescence behavior of red sandstone containing two unparallel fissures under uniaxial compression. Eng Geol 178:28–48
CrossRef
Zhang XP, 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 45:711–737
Zhang XP, Wong LNY (2013) Loading rate effects on cracking behavior of flaw-contained specimens under uniaxial compression. Int J Fract 180:93–110
CrossRef
Über dieses Kapitel
Titel
Discrete Element Modeling on Fracture Coalescence Behavior of Red Sandstone Containing Two Unparallel Fissures
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