A mobilized dilation angle model for rocks. International Journal of Rock Mechanics and Mining Sciences, 2004, 41(4): 679–686. An empirical dilatancy index for the dilatant deformation of rock. International Journal of Rock Mechanics and Mining Sciences, 2002, 39(4): 459–476. Application of a local degradation model to the analysis of brittle fracture of laboratory scale rock specimens under triaxial conditions. International Journal of Rock Mechanics and Mining Sciences, 2002, 39(4): 443–457.įANG Z, HARRISON J P. Development of a local degradation approach to the modelling of brittle fracture in heterogeneous rocks. International Journal of Rock Mechanics and Mining Sciences, 2001, 38(8): 1193–1199.įANG Z, HARRISON J P. International Journal of Rock Mechanics and Mining Sciences, 2002, 39(6): 731–741.įANG Z, HARRISON J P. HAJIABDOLMAJID V, KAISERAR P K, MARTIN C D. International Journal of Rock Mechanics and Mining Sciences and Geomechanics Abstracts, 1994, 31(6): 643–659. The progressive fracture of Lac du Bonnet granite. International Journal of Rock Mechanics and Mining Sciences, 2006, 43(7): 1001–1022. A review of the state of the art in modelling progressive mechanical breakdown and associated fluid flow in intact heterogeneous rocks. The sliding crack model of brittle deformation: An internal variable approach. Damage mechanics in the post-failure regime. The continuous damage theory of brittle materials-Part 1: general theory. Int J Rock Mech Min Sci Geomech Abstr, 1992, 29(1): 35–48. The good agreement between numerical and laboratory results indicates that the modified constitutive law is well suited to represent the nonlinear mechanical behavior of brittle rock especially in the post-failure region. Based on a lab data fitting procedure, a consistent parameter set for the modified constitutive model was deduced and implemented into the numerical code FLAC 3D. A series of triaxial compression tests were carried out on Eibenstock (Germany) granite samples. It incorporates non-linear Hoek-Brown failure criterion, confining pressure-dependent strength degradation and volume dilation laws, and is able to represent the nonlinear degradation and dilation behaviors of brittle rocks in the post-failure region.

In order to investigate progressive failure behavior in brittle rocks, a modified constitutive model was developed which follows the principles of the continuum damage mechanics method. The understanding of the rock deformation and failure process and the development of appropriate constitutive models are the basis for solving problems in rock engineering.

Triaxial test simulation in flac3d