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http://dx.doi.org/10.7474/TUS.2019.29.2.124

A Study on Subcritical Crack Growth Parameters in Rock-like Material under Monotonic and Cyclic Loading  

Ko, Tae Young (SK Engineering & Construction, TBM Team)
Publication Information
Tunnel and Underground Space / v.29, no.2, 2019 , pp. 124-134 More about this Journal
Abstract
Subcritical crack growth in rock material can occur under monotonic and cyclic loading. Subcritical crack growth plays an important role in evaluating the long-term stability of structures in rocks. This paper presents the results of studies conducted to determine subcritical crack growth parameters under monotonic and cyclic loading in rock-like material. The constant stress rate method was employed for monotonic loading. The subcritical crack growth parameter of n under cyclic loading was determined by the relation between the rate of crack growth per cycle and stress intensity factor range. The specimens contained pre-existing flaws with 45 and 60 degrees of inclination angle and flaws spacing and continuity were varied to arrange crack growth in shear or tensile manner. The results show that the parameter of n is almost constant regardless of the applied load conditions such as monotonic and cyclic or shear and tension.
Keywords
Subcritical cack growth; Monotonic; Cyclic; Shear; Tension;
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Times Cited By KSCI : 2  (Citation Analysis)
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1 Ashby, M.F. and S.D. Hallam, 1986, The failure of brittle solids containing small cracks under compressive stress states, Acta Metal. 34.3, 497-510.   DOI
2 Atkinson, B.K. and P.C. Meredith, 1987, The theory of subcritical crack growth with applications to minerals and rocks. In: Fracture Mechanics of Rock, Academic Press, London, 111p.
3 Bobet, A., 1997, Fracture Coalescence in Rock Materials: Experimental Observations and Numerical Predictions. Sc. D. Thesis, Massachusetts Institute of Technology, Cambridge, U.S.A.
4 Charles, R.J., 1958, Static fatigue of glass, J. Appl. Phys. 29.11, 1,549-1,560.   DOI
5 Cheon, D.S. and Y.B. Jung, 2017, Analysis of acoustic emission signals during long-term strength tests of brittle materials, Tunnel & Underground Space 27.3, 121-131.   DOI
6 Cox, S.J.D. and C.H. Scholz, 1988, Rupture initiation in shear fracture of rocks: an experimental study, J. Geophys. Res. 93, 4,920-4,938.
7 Hashiba, K., S. Okubo, and K. Fukui, 2006, A new testing method for investigating the loading rate dependency of peak and residual rock strength, Int. J. Rock Mech. Min. Sci. 43, 894-904.   DOI
8 Ingraffea, A.R., 1987, Theory of crack initiation and propagation in rock. In: Fracture Mechanics of Rock, Academic Press, London, 76p.
9 Jung Y.B, D.S. Cheon, E.S. Park, C. Part, Y.S. Lee, C.W. Park, and B.H. Choi, 2014, Estimation of the characteristics of delayed failure and long-term strength of granite by brazilian disc test, Tunnel & Underground Space 24.1, 67-80.   DOI
10 Kemeny, J.M. and N.G.W. Cook, 1987, Crack models for the failure of rock under compression, Proc. 2nd Int. Conference Constitutive Laws for Engineering Materials, Theory and Applications, Tucson, Arizona, Vol. 1, 879-887.
11 Atkinson, B.K., 1984, Subcritical crack growth in geological materials, J. Geophys. Res. 89.B6, 4,077-4,114.   DOI
12 Ko, T.Y, J. Kemeny, and H.K. Moon, 2008, Determination of subcritical crack growth parameters using double torsion test, Journal of the Korean Society for Geosystem Engineering 45.6, 610-609.
13 Ko, T.Y. and J. Kemeny, 2011, Subcritical crack growth in rocks under shear loading. J. Geophys. Res. Solid Earth 116. B1, B01407.
14 Ko, T.Y. and J. Kemeny, 2013, Determination of the subcritical crack growth parameters in rocks using the constant stress-rate test. Int. J. Rock Mech. Min. Sci. 59, 166-178.   DOI
15 Ko, T.Y, J. Kemeny, and S.W. Jeon, 2017, Loading rate dependency of strength and fracture toughness of rocks, Proc. YSRM 2017 & NDRMGE 2017, Jeju, Korea.
16 Paris, P.C., and F. Erdogan, 1963, A critical analysis of crack propagation laws. J. Basic Engineering 85, 528-534.   DOI
17 Swanson, P.L., 1984, Sub critical crack growth and other time and environment-dependent behavior in crustal rocks. J. Geophys. Res. 89, 8,015-8,036.
18 Ko, T.Y., 2008, Subcritical crack growth under Mode I, II and III loading for Coconino sandstone. Ph.D. Thesis, University of Arizona, Tucson, U.S.A.