Abstract
Shear-box (i.e. compression-shear) test and newly designed electrically conductive adhesive method were used to measure shear crack sub-critical propagation time and rate of sandstone specimen. Different cubic specimens with and without holes were tested to study the effect of holes on the shear crack sub-critical propagation. Numerical and experimental results show that three independent variables of hole, the interval distance S, the distance between the center of hole and the crack tip L, and hole radius R, have different contribution to the ratio of stress intensity factor of the specimen with holes to that of the specimen without hole, K II/K II0. Increasing S and decreasing L and R will result in the decrease of K II/K II0 and help crack arrest. The weight relation of the independent variables for K II/K II0 is S>L>R. The specimen DH3 with the largest value of S and the smallest values of L and R has the longest sub-critical crack propagation time and the smallest sub-critical crack propagation rate. Adding two suitable holes symmetrically to the original crack plane in rock specimen is considered to be a potential method for crack arrest of rock.
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CHEN Fu-lai, SHUAI Jian. Arrest structure and ductile determine methods of ductile fracture for gas transportation pipeline [J]. Pressure Vessel Technology, 2006, 23(7): 39–43. (in Chinese)
TSAMASPHYROS G, DIMOU G. Stress intensities in a strip reinforced by stiffeners at the edges [J]. Engineering Fracture Mechanics, 1995, 51(6): 897–914.
SETHURAMAN R, MAITI S K. Determination of mixed mode stress intensity factors for a crack-stiffened panel [J]. Engineering Fracture Mechanics, 1989, 33(3): 355–369.
HE Yun-shu, CHEN Li-jun, DU Hong-zeng. Effectiveness varying in dimension of crack-stopping holes [J]. Journal of Civil Aviation University of China, 2004, 22(3): 29–31. (in Chinese)
HU K X, CHANDRA A, HUANG Y. Multiple void-crack interaction [J]. International Journal of Solids and Structures, 1993, 30(11): 1473–1489.
YUAN Long-wei. Rheology on defective object [M]. Beijing: National Defence Industry Press, 1994. (in Chinese)
GONG S X, HORII H. General solution to the problem of microcracks near the tip of a main crack [J]. Journal of the Mechanics and Physics of Structures, 1989, 37: 27–46.
ZHOU Zeng-guo, LI Zhi-da, Experimental research on influence of voids on COD [J]. Journal of Wuhan University of Technology (Transportation Science & Engineering), 2001, 25(3): 326–328. (in Chinese)
HAN Jian-Jun, CHEN Yi-Heng. On the contribution of a microhole in the near-tip stress field to the J-integral [J]. International Journal of Fracture, 1997, 85: 169–183.
RAO Q H. Pure shear fracture of brittle rock-A theoretical and laboratory study [D]. Sweden: Luleå University of Technology, 1999.
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Foundation item: Project(50374073) supported by the National Natural Science Foundation of China; Project(1343-77239) supported by the Graduate Education Innovation Project of Central South University, China
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Xie, Hf., Rao, Qh., Xie, Q. et al. Effect of holes on in-plane shear (Mode II) crack sub-critical propagation of rock. J. Cent. South Univ. Technol. 15 (Suppl 1), 453–456 (2008). https://doi.org/10.1007/s11771-008-0398-8
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DOI: https://doi.org/10.1007/s11771-008-0398-8