The Effect of Temperature and Heating–Cooling Cycles on Mode I, Mode II and Mixed-Mode I-II Fracture Toughness of Sandstone

Document Type : Research - Paper

Authors

1 M.Sc Student, Dept. of Mining Engineering, Imam Khomeini International University, Qazvin, Iran

2 Associate Professor, Dept. of Mining Engineering, Imam Khomeini International University, Qazvin, Iran

3 Assistant Professor, Dept. of Civil Engineering, Imam Khomeini International University, Qazvin, Iran

Abstract

In the case of explosions and fires, the rocks undergo a cycle of heating and cooling. For that, first, they are exposed to considerable heat and then cooled after extinguishing the fire. Temperature variations and subsequent contraction and expansion affect the physical and mechanical properties of rocks. Through two series of tests, the effects of temperature and the number of heating-cooling cycles on the mode I, mode II and the effective mixed-mode I-II fracture toughness of Lushan sandstone were investigated. In the first series, the effect of temperature was studied in a heating–cooling cycle at ambient temperature (25°C) and 60, 150, 200, 300, 500, and 700°C. The highest and lowest mode I, mode II and the effective mixed-mode I-II fracture toughness were, observed at 150 and 700°C, respectively. In the second series of tests, the effect of the number of heating–cooling cycles was investigated on the mode I, mode II and the effective mixed-mode I-II fracture toughness of sandstone specimens at 150°C (for hydraulic fracturing modeling) and a crack inclination angle of 45°. According to the results, the mode I, mode II and the effective mixed-mode I-II fracture toughness increased in the first cycle and decreased with increasing the number of heating–cooling cycles. As the crack inclination increased, the effective mixed-mode I-II fracture toughness of the sandstone specimens increased. The mode II fracture toughness increased up to a crack inclination angle of 45° and then decreased. Moreover, the mode of fracture changes from opening mode (mode I) at the crack inclination angle of zero degree to mixed mode (tension-shear) at the crack inclination angle of less than 28.8°. The mode of fracture changes from tensile-shear to compression-shear at the crack inclination angle of greater than 28.8°.

Keywords

References

[1] Feng, G., Kang, Y., Chen, F., Liu, Y. W., and Wang, X. C. (2018). “The influence of temperatures on mixed-mode (I+ II) and mode-II fracture toughness of sandstone”. Engineering Fracture Mechanics, 189: 51-63.
[2] Lim, I. L., Johnston, I. W., and Choi, S. K. (1994). “Assessment of mixed-mode fracture toughness testing methods for rock”. In International Journal of Rock Mechanics and Mining Sciences & Geomechanics Abstracts, Pergamon, 31(3): 265-272.
[3] Haeri, H., and Marji, M. F. (2016). “Simulating the crack propagation and cracks coalescence underneath TBM disc cutters”. Arabian Journal of Geosciences, 9(2): 124.
[4] Kundu, T. (2008). “Fundamentals of fracture mechanics”. CRC press, pp. 283.
[5] Marji, M. F. (2014). “Numerical analysis of quasi-static crack branching in brittle solids by a modified displacement discontinuity method”. International Journal of Solids and Structures, 51(9): 1716-1736.
[6] Awaji, H., and Sato, S. (1978). “Combined Mode Fracture Toughness Measurement by the Disc Test, J. of Engng”. Journal of Engineering Materials and Technology, 100: 175-182.
[7] Khan, K. (1998). “Fracture toughness investigation of an indigenous limestone rock formation”. Doctoral Dissertation, King Fahd University of Petroleum and Minerals, pp. 209.
[8] Atkinson, C., Smelser, R. E., and Sanchez, J. (1982). “Combined mode fracture via the cracked Brazilian disk test”. International Journal of Fracture, 18(4): 279-291.
[9] Chong, K., and Kuruppu, M. (1984). “New specimen for fracture toughness determination for rock and other materials”. International Journal of Fracture, 26: R59–R62.
[10] Aliha, M. R. M., Mahdavi, E., and Ayatollahi, M. R. (2017). “The influence of specimen type on tensile fracture toughness of rock materials”. Pure and Applied Geophysics, 174(3): 1237-1253.
[11] Funatsu, T., Kuruppu, M., and Matsui, K. (2014). “Effects of temperature and confining pressure on mixed-mode (I–II) and mode II fracture toughness of Kimachi sandstone”. International Journal of Rock Mechanics and Mining Sciences, 67: 1-8.
[12] Xiankai, B., Meng, T., and Jinchang, Z. (2018). “Study of mixed mode fracture toughness and fracture trajectories in gypsum interlayers in corrosive environment”. Royal Society Open Science, 5(1): 171374.
[13] Hosseini, M. (2017). “Effect of temperature as well as heating and cooling cycles on rock properties”. Journal of Mining and Environment, 8(4): 631-644.
[14] Li-yun, L., Zhi-qiang, X., Ming-xiu, L., Yi, L., Chen, F., and Tie-Wu, T. (2013). “An experimental study of I-II-III mixed mode crack fracture of rock under different temperature”. In 13th International Conference on Fracture June, 16-21.
[15] Al-Shayea, N. A., and Khan, K. (2001). “Fracture toughness envelope of a limestone rock at high confining pressure and temperature”. In 10th International Conference on Fracture, Hawaii, 2-6.
[16] Mohtadi, V. R., and Mohtadi, A. R. (2015). “The results of ultrasonic testing on the concrete structure damaged in a fire accident, Sadaf Commercial Complex, Qeshm”. Civil Journal, Retrofitting and Improvement, 31: 79-83.
[17] Kim, K., Kemeny, J., and Nickerson, M. (2014). “Effect of rapid thermal cooling on mechanical rock properties”. Rock Mechanics and Rock Engineering, 47: 2005-2019.
[18] Ulusay, R. (Ed.). (2014). “The ISRM suggested methods for rock characterization, testing and monitoring: 2007-2014”. Springer, pp. 265.
[19] Funatsu, T., Seto, M., Shimada, H., Matsui, K., and Kuruppu, M. (2004). “Combined effects of increasing temperature and confining pressure on the fracture toughness of clay bearing rocks”. International Journal of Rock Mechanics and Mining Sciences, 41(6): 927-938.
[20] Boulin, P. F., Bretonnier, P., Gland, N., and Lombard, J. M. (2012). “Contribution of the steady state method to water permeability measurement in very low permeability porous media”. Oil & Gas Science and Technology–Revue d’IFP Energies nouvelles, 67(3): 387-401.
[21] 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 Mechanics and Rock Engineering, 35(4): 271-297.
[22] Lü, C., Sun, Q., Zhang, W., Geng, J., Qi, Y., and Lu, L. (2017). “The effect of high temperature on tensile strength of sandstone”. Applied Thermal Engineering, 111: 573-579. 

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History

  • Receive Date: 26 October 2020
  • Revise Date: 14 March 2021
  • Accept Date: 14 March 2021

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