Geomechanics and Engineering

  • 제12권6호
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  • Pages.919-933
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  • 2017
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  • 2005-307X(pISSN)
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  • 2092-6219(eISSN)
테크노프레스 (Techno-Press)
권호 표지
DOI QR코드

DOI QR Code

Strength failure behavior of granite containing two holes under Brazilian test

  • Huang, Yan-Hua (State Key Laboratory for Geomechanics and Deep Underground Engineering, School of Mechanics and Civil Engineering, China University of Mining and Technology) ;
  • Yang, Sheng-Qi (State Key Laboratory for Geomechanics and Deep Underground Engineering, School of Mechanics and Civil Engineering, China University of Mining and Technology) ;
  • Zhang, Chun-Shun (Department of Civil Engineering, Monash University)
  • 투고 : 2016.05.20
  • 심사 : 2017.01.16
  • 발행 : 2017.06.25
⟨ 이전 논문 다음 논문 ⟩

초록

A series of Brazilian tests under diameter compression for disc specimens was carried out to investigate the strength and failure behavior by using acoustic emission (AE) and photography monitoring technique. On the basis of experimental results, load-displacement curves, AE counts, real-time crack evolution process, failure modes and strength property of granite specimens containing two pre-existing holes were analyzed in detail. Two typical types of load-displacement curves are identified, i.e., sudden instability (type I) and progressive failure (type II). In accordance with the two types of load-displacement curves, the AE events also have different responses. The present experiments on disc specimens containing two pre-existing holes under Brazilian test reveal four distinct failure modes, including diametrical splitting failure mode (mode I), one crack coalescence failure mode (mode II), two crack coalescences failure mode (mode III) and no crack coalescence failure mode (mode IV). Compared with intact granite specimen, the disc specimen containing two holes fails with lower strength, which is closely related to the bridge angle. The failure strength of pre-holed specimen first decreases and then increases with the bridge angle. Finally, a preliminary interpretation was proposed to explain the strength evolution law of granite specimen containing two holes based on the microscopic observation of fracture plane.

키워드

과제정보

연구 과제 주관 기관 : Natural Science Foundation of Jiangsu, Fundamental Research Funds for the Central Universities

참고문헌

  1. Bieniawski, Z.T. and Hawkes, I. (1978), "Suggested methods for determining tensile strength of rock materials", Int. J. Rock Mech. Min. Sci. Geomech. Abstr., 15(1), 99-103. https://doi.org/10.1016/0148-9062(78)90003-7
  2. Cao, R.H., Cao, P., Fan, X., Xiong, X. and Lin, H. (2016), "An experimental and numerical study on mechanical behavior of ubiquitous-joint brittle rock-like specimens under uniaxial compression", Rock Mech. Rock Eng., 49(11), 4319-4338. https://doi.org/10.1007/s00603-016-1029-6
  3. Duriez, J., Scholtes, L. and Donze, F.V. (2016), "Micromechanics of wing crack propagation for different flaw properties", Eng. Fract. Mech., 153, 378-398. https://doi.org/10.1016/j.engfracmech.2015.12.034
  4. Fakhimi, A., Carvalho, F., Ishida, T. and Labuz, J.F. (2002), "Simulation of failure around a circular opening in rock", Int. J. Rock Mech. Min. Sci., 39(2), 507-515. https://doi.org/10.1016/S1365-1609(02)00041-2
  5. Haeri, H. (2015), "Propagation mechanism of neighboring cracks in rock-like cylindrical specimens under uniaxial compression", J. Min. Sci., 51(3), 487-496. https://doi.org/10.1134/S1062739115030096
  6. Haeri, H., Shahriar, K., Marji, M.F. and Moarefvand, P. (2014), "Cracks coalescence mechanism and cracks propagation paths in rock-like specimens containing pre-existing random cracks under compression", J. Cent. South Univ., 21(6), 2404-2414. https://doi.org/10.1007/s11771-014-2194-y
  7. Haeri, H., Khaloo, A. and Marji, M.F. (2015a), "Fracture analyses of different pre-holed concrete specimens under compression", Acta Mech. Sin., 31(6), 855-870. https://doi.org/10.1007/s10409-015-0436-3
  8. Haeri, H., Marji, M.F., Shahriar, K. and Moarefvand, P. (2015b), "On the HDD analysis of micro crack initiation, propagation, and coalescence in brittle materials", Arab. J. Geosci., 8(5), 2841-2852. https://doi.org/10.1007/s12517-014-1290-5
  9. Haeri, H., Shahriar, K., Marji, M.F. and Moarefvand, P. (2015c), "A coupled numerical-experimental study of the breakage process of brittle substances", Arab. J. Geosci., 8(2), 809-825. https://doi.org/10.1007/s12517-013-1165-1
  10. Huang, Y.H., Yang, S.Q., Tian, W.L., Zeng, W. and Yu, L.Y. (2016), "An experimental study on fracture mechanical behavior of rock-like materials containing two unparallel fissures under uniaxial compression", Acta Mech. Sin., 32(3), 442-455. https://doi.org/10.1007/s10409-015-0489-3
  11. Lee, H. and 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. https://doi.org/10.1016/j.ijsolstr.2010.12.001
  12. Lin, P., Zhou, Y., Liu, H. and Wang, C. (2013), "Reinforcement design and stability analysis for large-span tailrace bifurcated tunnels with irregular geometry", Tunn. Undergr. Space Technol., 38, 189-204. https://doi.org/10.1016/j.tust.2013.07.011
  13. Lin, P., Wong, R.H.C. and Tang, C.A. (2015), "Experimental study of coalescence mechanisms and failure under uniaxial compression of granite containing multiple holes", Int. J. Rock Mech. Min. Sci., 77, 313-327.
  14. Liu, J.P., Li, Y.H., Xu, S.D., Xu, S., Jin, C.Y. and Liu, Z.S. (2015), "Moment tensor analysis of acoustic emission for cracking mechanisms in rock with a pre-cut circular hole under uniaxial compression", Eng. Fract. Mech., 135, 206-218. https://doi.org/10.1016/j.engfracmech.2015.01.006
  15. Mellor, M. and Hawkes, I. (1971), "Mesurment of tensile strength by diametral compression of disc and annuli", Eng. Geo., 5(3), 173-225. https://doi.org/10.1016/0013-7952(71)90001-9
  16. Park, C.H. and Bobet, A. (2010), "Crack initiation, propagation and coalescence from frictional flaws in uniaxial compression", Eng. Fract. Mech., 77(14), 2727-2748. https://doi.org/10.1016/j.engfracmech.2010.06.027
  17. Steen, B.V.D., Vervoort, A. and Napier, J.A.L. (2005), "Observed and simulated fracture pattern in diametrically loaded discs of rock material", Int. J. Fract., 131(1), 35-52. https://doi.org/10.1007/s10704-004-3177-z
  18. Tang, C.A., Wong, R.H.C., Chau, K.T. and Lin, P. (2005), "Modeling of compression-induced splitting failure in heterogeneous brittle porous solids", Eng. Fract. Mech., 72(4), 597-615. https://doi.org/10.1016/j.engfracmech.2004.04.008
  19. Wang, S.Y., Sun, L., Yang, C., Yang, S.Q. and Tang, C.A. (2013), "Numerical study on static and dynamic fracture evolution around rock cavities", J. Rock Mech. Geotech. Eng., 5(4), 262-276. https://doi.org/10.1016/j.jrmge.2012.10.003
  20. Wang, S.Y., Sloan, S.W. and Tang, C.A. (2014), "Three-dimensional numerical investigations of the failure mechanism of a rock disc with a central or eccentric hole", Rock Mech. Rock Eng., 47(6), 2117-2137. https://doi.org/10.1007/s00603-013-0512-6
  21. Wong, R.H.C., Lin, P. and Tang, C.A. (2006), "Experimental and numerical study on splitting failure of brittle solids containing single pore under uniaxial compression", Mech. Mater., 38(1), 142-159. https://doi.org/10.1016/j.mechmat.2005.05.017
  22. Yang, S.Q. (2015), "An experimental study on fracture coalescence characteristics of brittle sandstone specimens combined various flaws", Geomech. Eng., Int. J., 8(4), 541-557. https://doi.org/10.12989/gae.2015.8.4.541
  23. Yin, P., Wong, R.H.C. and Chau, K.T. (2014), "Coalescence of two parallel pre-existing surface cracks in granite", Int. J. Rock Mech. Min. Sci., 68, 66-84.
  24. Yin, Q., Jing, H.W. and Ma, G.W. (2015), "Experimental study on mechanical properties of sandstone specimens containing a single hole after high-temperature exposure", Geotech. Lett., 5(1), 43-48. https://doi.org/10.1680/geolett.14.00121
  25. Zhao, X., Zhang, H. and Zhu, W. (2014), "Fracture evolution around pre-existing cylindrical cavities in brittle rocks under uniaxial compression", Trans. Nonferrous Met. Soc. China, 24(3), 806-815. https://doi.org/10.1016/S1003-6326(14)63129-0
  26. Zhou, X.P., Bi, J. and Qian, Q.H. (2015), "Numerical simulation of crack growth and coalescence in rocklike materials containing multiple pre-existing flaws", Rock Mech. Rock Eng., 48(3), 1097-1114. https://doi.org/10.1007/s00603-014-0627-4
  27. Zhou, S., Zhu, H., Yan, Z., Ju, J.W. and Zhang, L. (2016), "A micromechanical study of the breakage mechanism of microcapsules in concrete using PFC2D", Constr. Build. Mater., 115, 452-463. https://doi.org/10.1016/j.conbuildmat.2016.04.067