Boundary Element Analysis of Crack Propagation on Anisotropic Rocks

Rock masses in nature contain numerous
discontinuities as cracks,
joints, cleavages, beddings and even faults etc. In
the cracked
material, the stress intensity factors (SIFs) at
crack tips, which
govern the crack propagation and are associated with
the strength
of the material, are strongly affected by crack
inclination angle,
orientation of anisotropy. This book presents the
development of a
unified numerical framework based on the BEM for
modeling crack
propagation behavior in anisotropic rocks.

The following topics are discussed in this book:

1. Evaluating the SIFs A new formulation of the BEM,
   based on the
   relative displacements at the crack tip, is used to
   determine the
   mixed mode SIFs of isotropic and anisotropic rocks.
2. Determination of Fracture Toughness A procedure
   to determine
   the fracture toughness of anisotropic rocks under
   mixed mode I-II
   loadings is presented.

3. Simulation of Crack Propagation The BEM
   formulation combined
   with the maximum circumferential stress criterion
   was used to
   simulate the crack propagation paths.

   Autorentext
   Chien-Chung Ke is a graduate of the Department of Resources Engineering at National Cheng Kung University, Taiwan. He is Research Engineer of Geotechnical Engineering Research Center at Sinotech Engineering Consultants, Inc., Taiwan. Chao-Shi Chen is Associate Professor at National Cheng Kung University, Taiwan.

   Klappentext
   Rock masses in nature contain numerous discontinuities as cracks, joints, cleavages, beddings and even faults etc. In the cracked material, the stress intensity factors (SIFs) at crack tips, which govern the crack propagation and are associated with the strength of the material, are strongly affected by crack inclination angle, orientation of anisotropy. This book presents the development of a unified numerical framework based on the BEM for modeling crack propagation behavior in anisotropic rocks. The following topics are discussed in this book: 1. Evaluating the SIFs-A new formulation of the BEM, based on the relative displacements at the crack tip, is used to determine the mixed mode SIFs of isotropic and anisotropic rocks. 2. Determination of Fracture Toughness-A procedure to determine the fracture toughness of anisotropic rocks under mixed mode I-II loadings is presented. 3. Simulation of Crack Propagation-The BEM formulation combined with the maximum circumferential stress criterion was used to simulate the crack propagation paths.