Geomechanics and Engineering

  • 제24권2호
  • /
  • Pages.157-166
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  • 2021
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  • 2005-307X(pISSN)
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  • 2092-6219(eISSN)
테크노프레스 (Techno-Press)
권호 표지
DOI QR코드

DOI QR Code

Mechanical behavior of Beishan granite samples with different slenderness ratios at high temperature

  • Zhang, Qiang (School of Mechanics and Civil Engineering, State Key Laboratory for Geomechanics and Deep Underground Engineering, China University of Mining and Technology) ;
  • Li, Yanjing (School of Mechanics and Civil Engineering, State Key Laboratory for Geomechanics and Deep Underground Engineering, China University of Mining and Technology) ;
  • Min, Ming (School of Civil and Hydraulic Engineering, Huazhong University of Science and Technology) ;
  • Jiang, Binsong (School of Mechanics and Civil Engineering, State Key Laboratory for Geomechanics and Deep Underground Engineering, China University of Mining and Technology)
  • 투고 : 2019.12.07
  • 심사 : 2021.01.08
  • 발행 : 2021.01.25
⟨ 이전 논문 다음 논문 ⟩

초록

This paper aims at the temperature and slenderness ratio effects on physical and mechanical properties of Beishan granite. A series of uniaxial compression tests with various slenderness ratios and temperatures were carried out, and the acoustic emission signal was also collected. As the temperature increases, the fracture aperture of intercrystalline cracks gradually increases, and obvious transcrystalline cracks occurs when T > 600℃. The failure patterns change from tensile failure mode to ductile failure mode with the increasing temperature. The elastic modulus decreases with the temperature and increases with slenderness ratio, then tends to be a constant value when T = 1000℃. However, the peak strain has the opposite evolution as the elastic modulus under the effects of temperature and slenderness ratio. The uniaxial compression strength (UCS) changes a little for the low-temperature specimens of T < 400℃, but a significant decrease happens when T = 400℃ and 800℃ due to phase transitions of mineral. The evolution denotes that the critical brittle-ductile transition temperature increases with slenderness ratio, and the critical slenderness ratio corresponding to the characteristic mechanical behavior tends to be smaller with the increasing temperature. Additionally, the AE quantity also increases with temperature in an exponential function.

키워드

과제정보

The authors are grateful to the financial support from the National Natural Science Foundation of China (52074269) and China Postdoctoral Science Foundation (Nos. 2020T130698 and 2018 M640534).

참고문헌

  1. Bieniawski, Z.T. (1967), "The effect of specimen size on compressive strength of coal", Int. J. Rock Mech. Min. Sci., 5(4), 325-335. https://doi.org/10.1016/0148-9062(68)90004-1.
  2. Brotons, V., Tomas, R., Ivorra, S. and Alarcon, J.C. (2013), "Temperature influence on the physical and mechanical properties of a porous rock: San Julian's calcarenite", Eng. Geol., 167(4), 117-127. https://doi.org/10.1016/j.enggeo.2013.10.012.
  3. Ding, Q.L, Ju, F., Mao, X.B., Ma, D., Yu, B.Y. and Song, S.B. (2016), "Experimental investigation of the mechanical behavior in unloading conditions of sandstone after high-temperature treatment", Rock Mech. Rock Eng., 49(7), 2641-2653. https://doi.org/10.1007/s00603-016-0944-x.
  4. Dwivedia, R.D., Goela, R.K., Prasada, V.V.R. and Sinhab, A. (2008), "Thermo-mechanical properties of Indian and other granites", Int. J. Rock Mech. Min. Sci., 45(3), 303-315. https://doi.org/10.1016/j.ijrmms.2007.05.008.
  5. Ercikdi, B., Karaman, K., Cihangir, F., Yilmaz, T., Aliyazicioglou, S. and Kesimal, A. (2016) "Core size effect on the dry and saturated ultrasonic pulse velocity of limestone samples", Ultrasonics, 72, 143-149. https://doi.org/10.1016/j.ultras.2016.08.006.
  6. Guo, Q.Z., Su, H.J., Liu, J.W., Yin, Q., Jing, H.W. and Yu, L.Y. (2020), "An experimental study on the fracture behaviors of marble specimens subjected to high temperature treatment", Eng. Fract. Mech., 225, 106862. https://doi.org/10.1016/j.engfracmech.2019.106862.
  7. Jamshidi, A., Zamanian, H. and Sahamieh, R.Z. (2018) "The effect of density and porosity on the correlation between uniaxial compressive strength and P-wave velocity", Rock Mech. Rock Eng., 51(4), 1-8. https://doi.org/10.1007/s00603-017-1379-8.
  8. Kong, B., Wang, E.Y., Li, Z.H., Wang, X.R., Liu, J. and Li, N. (2016), "Fracture mechanical behavior of sandstone subjected to high-temperature treatment and its acoustic emission characteristics under uniaxial compression conditions", Rock Mech. Rock Eng., 49(12), 4911-4918. https://doi.org/10.1007/s00603-016-1011-3.
  9. Liu, S. and Xu, J.Y. (2015a), "An experimental study on the physico-mechanical properties of two post-high-temperature rocks", Eng. Geol., 185, 63-70. https://doi.org/10.1016/j.enggeo.2014.11.013.
  10. Liu, S. and Xu, J.Y. (2015b), "Fractal analysis for dynamic failure characteristics of granite induced by mechanical-thermal loading", Geotech. Lett., 5(3), 191-197. https://doi.org/10.1680/jgele.15.00035.
  11. Masoumi, H., Saydam, S. and Hagan, P.C. (2016), "Unified size-effect law for intact rock", Int. J. Geomech., 16(2), 04015059. https://doi.org/10.1061/(ASCE)GM.1943-5622.0000543.
  12. Peng, J., Rong, G., Cai, M., Yao, M.Q. and Zhou, C.B. (2016), "Physical and mechanical behaviors of a thermal-damaged coarse marble under uniaxial compression", Eng. Geol., 200(12), 88-93. https://doi.org/10.1016/j.enggeo.2015.12.011.
  13. Quinones, J., Arzua, J., Alejano, L.R., Garcia-Bastante, F., Mas Ivars, D. and Walton, G. (2017), "Analysis of size effects on the geomechanical parameters of intact granite samples under unconfined conditions", Acta Geotech., 12(6), 1229-1242. https://doi.org/10.1007/s11440-017-0531-7.
  14. Ranjith, P.G., Daniel, R.V., Bai, J.C., Alarcon, J.C. and Samintha, A.P. (2012), "Transformation plasticity and the effect of temperature on the mechanical behaviour of Hawkesbury sandstone at atmospheric pressure", Eng. Geol., 151, 120-127. https://doi.org/10.1016/j.enggeo.2012.09.007.
  15. Su, H.J., Guo, Q.Z., Jing, H.W., Yu, L.Y., Liu, J.W. and Gao, Y.N. (2020) "Mechanical performances and pore features of coal subjected to heat treatment in approximately vacuum environment", Int. J. Geomech., 20(7), 06020011. https://doi.org/10.1061/(ASCE)GM.1943-5622.0001713.
  16. Sun, Q., Zhang, W.Q., Xue, L., Zhang, Z.Z. and Su, T.M. (2015), "Thermal damage pattern and thresholds of granite", Environ. Earth Sci., 74(3), 2341-2349. https://doi.org/10.1007/s12665-015-4234-9.
  17. Tian, H., Mei, G., Jiang, G.S. and Qin, Y. (2017), "High-temperature influence on mechanical properties of diorite", Rock Mech. Rock Eng., 50(6), 1661-1666. https://doi.org/10.1007/s00603-017-1185-3.
  18. Wu, J.Y., Feng, M.M., Yu, B.Y. and Han, G.S. (2018), "The length of pre-existing fissures effects on the mechanical properties of cracked red sandstone and strength design in engineering", Ultrasonics, 82, 188-199. https://doi.org/10.1016/j.ultras.2017.08.010.
  19. Yin, T.B., Shu, R.H., Li, X.B., Wang, P. and Liu, X.L. (2016), "Comparison of mechanical properties in high temperature and thermal treatment granite", Trans. Nonferrous Met. Soc. China, 26(7), 1926-1937. https://doi.org/10.1016/S1003-6326(16)64311-X.
  20. Zhang, L.Y., Mao, X.B., Liu, R.X., Guo, X.Q. and Ma, D. (2014), "The mechanical properties of mudstone at high temperatures: An experimental study", Rock Mech. Rock Eng., 47(4), 1479-1484. https://doi.org/10.1007/s00603-013-0435-2.
  21. Zhang, X.P., Zhang, Q. and Wu, S.C. (2017), "Acoustic emission characteristics of the rock-like material containing a single flaw under different compressive loading rates", Comput. Geotech., 83, 83-97. https://doi.org/10.1016/j.compgeo.2016.11.003.