Using ring-shape specimens containing two aligned cracks on the internal surface of the
ring, two test configurations subjected to tensile or compressive loads namely (i) …

Insight into the anisotropic fracture properties of shale under a high in situ stress is important
for the design and optimization of hydraulic fracturing treatment for deep shale formations. In …

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 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 discusses the scale dependence of the mode I fracture toughness of rocks
measured via the semi-circular bend (SCB) test. An extensive set of experiments is …

To investigate the anisotropic fracture characteristics of coal, physical tests are carried out
on semi-circular bend specimens with different pre-crack inclinations and bedding …

Rock is a typical quasi-brittle and heterogeneous material that shows the apparent size
effect of mode I fracture toughness (K Ic). To further explore the mechanism of the size effect …

This paper introduces the series expansion of the crack tip asymptotic fields in an
anisotropic plane. Using stress-based definitions of the fracture loading modes, we present …

Obtaining the accurate fracture toughness of coal considering bedding angle and
independent of size is of great significance to the evaluation of the initiation pressure in the …

The asymmetric semi-circular bending (ASCB) specimens have garnered attention from
researchers due to their straightforward fabrication process and convenient experimental …