Abstract
The fracture patterns of brittle materials in different stress loading modes are different. In order to study the fracture characteristics of brittle materials under confining pressure, in this study, both uniaxial compression tests and loading confining pressure tests were conducted on three concrete samples of different strengths, respectively. Meanwhile, the failure process of the samples during the loading of confining pressure was monitored using an acoustic wave tester; finally, the failure characteristics of the concrete samples were further investigated on a mesoscopic level by carrying out numerical simulations. The test results show that different failure modes were revealed in the concrete samples subjected to uniaxial compression: The failure initially started at both ends and then gradually extended to the middle part along the longitudinal direction; eventually, splitting failure, single inclined plane shear failure and conjugated inclined plane shear failure occurred. However, as the confining pressure was loaded, the samples failed merely in a simple mode, that is, the fractures occurred around the middle parts of the samples, perpendicular to the specimens axis. According to the acoustic measurements, the local failure processes before fracturing under confining pressure were consistent with those under uniaxial compression. The simulation results suggest that the failure initially started inside the samples due to the effects of longitudinal tensile stress under confining pressure, and then, it gradually extended to both sides along the lateral direction.
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References
Bai, Q.S.; Tu, S.H.; Chen, M.; Zhang, C.: Numerical modeling of coal wall spall in a longwall face. Int. J. Rock Mech. Min. Sci. 88, 242–253 (2015)
Jiang, C.L.; Yu, Q.X.: The Spherical Shell Instability Mechanism and Prevention Technology of Coal and Gas Outburst. China University of Mining and Technology Press, Xuzhou (1998)
Wang, C.J.; Yang, S.Q.; Jiang, C.L.; Yang, D.D.; Zhang, C.J.; Li, X.W.; Chen, Y.J.; Tang, J.: A method of rapid determination of gas pressure in a coal seam based on the advantages of gas spherical flow field. J. Nat. Gas Sci. Eng. 45, 502–510 (2017)
Lawson, H.E.; Tesarik, D.; Larson, M.K.; Abraham, H.: Effects of overburden characteristics on dynamic failure in underground coal mining. Int. J. Min. Sci. Technol. 27, 121–129 (2017)
Zhou, A.T.; Wang, K.; Fan, L.P.; Kiryaeva, T.A.: Gas-solid coupling laws for deep high-gas coal seams. Int. J. Min. Sci. Technol. 27, 675–679 (2017)
Zuo, J.P.; Chen, Y.; Cui, F.: Investigation on mechanical properties and rock burst tendency of different coal-rock combined bodies. J. China Univ. Min. Technol. 47(1), 81–87 (2018)
Medhurst, T.P.; Brown, E.T.: A study of the mechanical behaviour of coal for pillar design. Int. J. Rock Mech. Min. Sci. 8, 1087–1105 (1998)
Wu, Y.P.; Gao, X.C.: Experimental comparative study on lateral deformation characteristics of coal sample in different loading path. J. China Coal Soc. 35, 44–48 (2010)
Kong, X.G.; Wang, E.Y.; Hu, S.B.; Liu, X.F.; Xu, Z.Y.; Zhan, T.Q.: Research on precursory characteristics of critical slowing down before the failure of coal samples containing methane. J. China Univ. Min. Technol. 46(1), 1–7 (2017)
Chen, W.X.; He, X.Q.; Liu, M.J.; Mitri, H.; Wang, Q.: Meso- and macro-behaviour of coal rock: observations and constitutive model development. Int. J. Min. Reclam. Environ. 30(1), 13–24 (2013)
Camborde, F.; Mariotti, C.; Donze, F.V.: Numerical study of rock and concrete behaviour by discrete element modelling. Comput. Geotech. 27, 225–247 (2000)
Sfer, D.; Carol, I.; Gettu, R.; Etse, G.: Study of the behavior of concrete under triaxial compression. J. Eng. Mech. 2, 156–163 (2002)
Grassl, P.; Jirásek, M.: Meso-scale approach to modelling the fracture process zone of concrete subjected to uniaxial tension. Int. J. Solids Struct. 47, 957–968 (2010)
Cusatis, G.; Bažant, Z.P.; Cedolin, L.: Confinement-shear lattice model for concrete damage in tension and compression: I. Theory. J. Eng. Mech. 12, 1439–1448 (2003)
Caballero, A.; Lo’pez, C.M.; Carol, I.: 3D meso-structural analysis of concrete specimens under uniaxial tension. Comput. Methods Appl. Mech. Eng. 195, 7182–7195 (2006)
Cicekli, U.; Voyiadjis, G.Z.; Al-Rub, R.K.A.: A plasticity and anisotropic damage model for plain concrete. Int. J. Plast. 23, 1874–1900 (2007)
Yu, X.B.; Xie, Q.; Li, X.Y.; Wang, Q.R.; Song, Z.P.: Acoustic emission of rocks under direct tension, Barazilian and uniaxial compression. Chin. J. Rock Mech. Eng. 26, 137–142 (2007)
Yang, S.Q.; Xu, P.; Ranjith, P.G.: Damage model of coal under creep and triaxial compression. Int. J. Rock Mech. Min. Sci. 80, 337–345 (2015)
Jiang, M.J.; Chen, H.; Crosta, G.B.: Numerical modeling of rock mechanical behavior and fracture propagation by a new bond contact model. Int. J. Rock Mech. Min. Sci. 78, 175–189 (2015)
Zhou, F.; Xu, M.J.; Ma, Z.G.; Ma, Z.G.; Cai, L.; Zhu, Z.; Li, J.: An experimental study on the correlation between the elastic wave velocity and microfractures in coal rock from the Qingshui basin. J. Geophys. Eng. 9, 691–696 (2012)
Xu, J.; Cheng, L.C.; Tan, H.Y.; Wang, L.; Wu, H.: Effects of original cracks on macro-meso evolution law of coal shear failure. Chin. J. Rock Mech. Eng. 32, 33–40 (2013)
Rodríguez, P.; Arab, P.B.; Celestino, T.B.: Characterization of rock cracking patterns in diametral compression tests by acoustic emission and petrographic analysis. Int. J. Rock Mech. Min. Sci. 83, 73–85 (2016)
Fairhurst, C.E.; Hudson, J.A.: Draft ISRM Suggested Method for the complete stress-strain curve for the intact rock in uniaxial compression. Int. J. Rock Mech. Min. Sci. 3, 279–289 (1999)
Khandelwal, M.; Singh, T.N.: Correlating static properties of coal measures rocks with P-wave velocity. Int. J. Coal Geol. 79, 55–60 (2009)
Wnuk, M.P.; Yavari, A.: Discrete fractal fracture mechanics. Eng. Fract. Mech. 75, 1127–1142 (2008)
Wnuk, M.P.; Yavari, A.: On estimating stress intensity factors and modulus of cohesion for fractal cracks. Eng. Fract. Mech. 70, 1659–1674 (2003)
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Wang, C., Yang, S., Li, X. et al. Study on the Failure Characteristics of Concrete Specimen Under Confining Pressure. Arab J Sci Eng 44, 4119–4129 (2019). https://doi.org/10.1007/s13369-018-3335-7
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DOI: https://doi.org/10.1007/s13369-018-3335-7