Abstract
Dynamic fracture failure of rocks subjected to static hydrostatic pressure is commonly encountered in deep underground rock engineering. The static fracture behavior of rocks under hydrostatic stress has been well studied in the literature. However, it is desirable to investigate the dynamic fracture failure of rocks under various hydrostatic pressures. In this study, a triaxial split Hopkinson pressure bar (SHPB) system is used to measure the dynamic fracture toughness of rocks under five hydrostatic pressures. The results show that dynamic fracture toughness under a certain hydrostatic pressure enhances with the increase of the loading rate, and the dynamic fracture toughness at the similar loading rate increases with the hydrostatic pressure due to the closure of microcracks in rocks. An empirical formula is proposed to describe the influences of the loading rate and the hydrostatic pressure on the rock dynamic fracture toughness.
References
Schmidt RA, Huddle CW (1977) Effect of confining pressure on fracture toughness of Indiana limestone. Int J Rock Mech Min Sci Geomech Abst 14(5):289–293. https://doi.org/10.1016/0148-9062(77)90740-9
Thiercelin M (1987) Fracture toughness under confining pressure using the modified ting test. Paper presented at the 28th U.S. Symposium on rock mechanics (USRMS), Tucson, Arizona, 29 June - 1 July 1987
Al-Shayea NA, Khan K, Abduljauwad SN (2000) Effects of confining pressure and temperature on mixed-mode (I–II) fracture toughness of a limestone rock. Int J Rock Mech Min Sci 37(4):629–643. https://doi.org/10.1016/S1365-1609(00)00003-4
Backers T, Stephansson O, Rybacki E (2002) Rock fracture toughness testing in mode II—punch-through shear test. Int J Rock Mech Min Sci 39(6):755–769. https://doi.org/10.1016/S1365-1609(02)00066-7
Al-Shayea N (2002) Comparing reservoir and outcrop specimens for mixed mode I–II fracture toughness of a limestone rock formation at various conditions. Rock Mech Rock Eng 35(4):271–297. https://doi.org/10.1007/s00603-002-0027-z
Ko TY, Kemeny J (2007) Effect of confining stress and loading rate on fracture toughness of rocks. Paper presented at the 1st Canada - U.S. rock mechanics symposium, Vancouver, Canada, 27-31 May 2007
Kataoka M, Mahdavi E, Funatsu T, Takehara T, Obara Y, Fukui K, Hashiba K (2017) Estimation of mode I fracture toughness of rock by semi-circular bend test under confining pressure condition. Paper presented at the ISRM European Rock Mechanics Symposium - EUROCK 2017, Ostrava, Czech Republic, 20-22 June 2017
Hashida T, Oghikubo H, Takahashi H, Shoji T (1993) Numerical simulation with experimental verification of the fracture behavior in granite under confining pressures based on the tension-softening model. Int J Fract 59(1):227–244. https://doi.org/10.1007/bf00012363
Sato K, Hashida T (2006) Cohesive crack analysis of toughness increase due to confining pressure. Pure Appl Geophys 163(5):1059–1072. https://doi.org/10.1007/s00024-006-0060-2
Zhao G, Kazerani T, Man K, Gao M, Zhao J (2015) Numerical study of the semi-circular bend dynamic fracture toughness test using discrete element models. Sci China Tech Sci 58(9):1587–1595. https://doi.org/10.1007/s11431-015-5887-z
Xu Y, Dai F, Xu NW, Zhao T (2016) Numerical investigation of dynamic rock fracture toughness determination using a semi-circular bend specimen in Split Hopkinson pressure Bar testing. Rock Mech Rock Eng 49(3):731–745. https://doi.org/10.1007/s00603-015-0787-x
Xia K, Yao W (2015) Dynamic rock tests using split Hopkinson (Kolsky) bar system – a review. J Rock Mech Geotech Eng 7(1):27–59. https://doi.org/10.1016/j.jrmge.2014.07.008
Dai F, Huang S, Xia K, Tan Z (2010) Some fundamental issues in dynamic compression and tension tests of rocks using split Hopkinson pressure bar. Rock Mech Rock Eng 43(6):657–666. https://doi.org/10.1007/s00603-010-0091-8
Nasseri MHB, Mohanty B (2008) Fracture toughness anisotropy in granitic rocks. Int J Rock Mech Min Sci 45(2):167–193. https://doi.org/10.1016/j.ijrmms.2007.04.005
Xia K, Yao W, Wu B (2017) Dynamic rock tensile strengths of Laurentian granite: experimental observation and micromechanical model. J Rock Mech Geotech Eng 9(1):116–124. https://doi.org/10.1016/j.jrmge.2016.08.007
Chen R, Li K, Xia K, Lin Y, Yao W, Lu F (2016) Dynamic fracture properties of rocks subjected to static pre-load using notched semi-circular bend method. Rock Mech Rock Eng 49(10):3865–3872. https://doi.org/10.1007/s00603-016-0958-4
Zhou YX, Xia K, Li XB, Li HB, Ma GW, Zhao J, Zhou ZL, Dai F (2012) Suggested methods for determining the dynamic strength parameters and mode-I fracture toughness of rock materials. Int J Rock Mech Min Sci 49:105–112. https://doi.org/10.1016/j.ijrmms.2011.10.004
Wu BB, Yao W, Xia KW (2016) An experimental study of dynamic tensile failure of rocks subjected to hydrostatic confinement. Rock Mech Rock Eng 49(10):3855–3864. https://doi.org/10.1007/s00603-016-0946-8
Wu B, Chen R, Xia K (2015) Dynamic tensile failure of rocks under static pre-tension. Int J Rock Mech Min Sci 80:12–18. https://doi.org/10.1016/j.ijrmms.2015.09.003
Tatone BSA, Grasselli G (2015) Characterization of the effect of normal load on the discontinuity morphology in direct shear specimens using X-ray micro-CT. Acta Geotech 10(1):31–54. https://doi.org/10.1007/s11440-014-0320-5
Yin T, Li X, Xia K, Huang S (2012) Effect of thermal treatment on the dynamic fracture toughness of Laurentian granite. Rock Mech Rock Eng 45(6):1087–1094. https://doi.org/10.1007/s00603-012-0240-3
Yao W, Xu Y, Yu C, Xia K (2017) A dynamic punch-through shear method for determining dynamic mode II fracture toughness of rocks. Eng Fract Mech 176:161–177. https://doi.org/10.1016/j.engfracmech.2017.03.012
Dai F, Chen R, Xia K (2010) A semi-circular bend technique for determining dynamic fracture toughness. Exp Mech 50(6):783–791. https://doi.org/10.1007/s11340-009-9273-2
Chen R, Xia K, Dai F, Lu F, Luo SN (2009) Determination of dynamic fracture parameters using a semi-circular bend technique in split Hopkinson pressure bar testing. Eng Fract Mech 76(9):1268–1276. https://doi.org/10.1016/j.engfracmech.2009.02.001
Acknowledgements
This research was supported by the Natural Sciences and Engineering Research Council of Canada (NSERC) through the Discovery Grant # 72031326. This work was supported by Mitacs through the Mitacs Accelerate program. Shengwei Li and Zhili Tang helped conduct the experiments. Qi Zhao at University of Toronto helped conduct the CT scanning.
Author information
Authors and Affiliations
Corresponding author
Additional information
Publisher’s Note
Springer Nature remains neutral with regard to jurisdictional claims in published maps and institutional affiliations.
Rights and permissions
About this article
Cite this article
Yao, W., Xia, K. & Zhang, T. Dynamic Fracture Test of Laurentian Granite Subjected to Hydrostatic Pressure. Exp Mech 59, 245–250 (2019). https://doi.org/10.1007/s11340-018-00437-4
Received:
Accepted:
Published:
Issue Date:
DOI: https://doi.org/10.1007/s11340-018-00437-4