Study on Propagation Rules of a Close Crack in Rockmass
In this paper, supposing the rockmass is an idealistic elastic object, the methods to calculate I type and II type strength factors of the crack tip are obtained by analyzing the stress state of the inner surface of a close crack in rockmass under compressive and shear stress and applying complex variable function stress method and superposition principle. Furthermore, supposing the friction coefficient, f , of the crack surface is a constant and the normal pressure, P(x) , on the crack surface obeys to normal distribution, the propagation rules of a close crack under compressive and shear stress are also deduced.
J. Alfaiate, M.H. Aliabadi, M. Guagliano and L. Susmel
G. Zhang et al., "Study on Propagation Rules of a Close Crack in Rockmass", Key Engineering Materials, Vols. 348-349, pp. 337-340, 2007