Experimental and theoretical analyses are presented that assess true mode II fracture
toughness, K IIc, fracture energy, G IIc, and associated fracture process zone (FPZ) in …

This paper presents the results of 124 pure Mode I fracture toughness tests on two types of
anisotropic rocks, the metamorphic Grimsel Granite and the sedimentary Mont Terri …

We evaluate the accuracy of three well-known fracture growth theories to predict crack
trajectories in anisotropic rocks through comparison with new experimental data. The results …

This paper reviews crack tip asymptotic fields in generic plane anisotropic media, rigorously
categorising about 400 studies devoted to the determination of the asymptote coefficients …

This article applies the finite element over-deterministic (FEOD) method to determine the
coefficients of the crack tip asymptotic fields in an anisotropic plane. This method relies on …

This study reports the coefficients of the crack tip asymptotic field for the semi-circular bend
(SCB) specimen made of anisotropic rocks when subjected to pure mode I loading. The …

The evaluation of the stress intensity factors (SIFs), T-stress, and higher-order coefficients in
the crack tip asymptotic field in the extended finite element method (XFEM) is investigated …

Williams asymptotic expansions are widely used to represent mechanical fields at the
vicinity of crack-tips in plane elastic media. For practical applications, series solutions have …

A comprehensive understanding of fracturing in rock formations requires a deep knowledge
of the intrinsic mechanical characteristics of rock-type materials. While conventional isotropy …