Linear Elastic Fracture Mechanics Characterization of an Anisotropic Shale.

ABSTRACT: The existence of bedding planes in natural shale formations makes the fracture characterization remarkably complicated. To achieve a further understanding of the anisotropic crack extension behaviors of shale using a linear elastic fracture mechanics approach, four groups of three-point bending tests on Longmaxi shale from southeast Chongqing were conducted in this study with different bedding plane inclination angles. The fracture propagation paths were observed using a scanning electron microscope. The results indicated that cracks initiated along the bedding plane when the bedding plane inclination angle (i.e., the angle between the loading direction and the normal direction of the bedding plane) was relatively large; in contrast, cracks penetrated into the matrix and induced higher fra

SUBMITTER: Luo Y 

PROVIDER: S-EPMC5981205 | biostudies-literature | 2018 May

REPOSITORIES: biostudies-literature