Digital Image Based Approach for Three-Dimensional Mechanical Analysis of Heterogeneous Rocks |
| |
| Authors: | S Chen Z Q Yue L G Tham |
| |
| Institution: | (1) Department of Civil Engineering, The University of Hong Kong, Hong Kong, P.R. China |
| |
| Abstract: | Summary This paper presents a digital image based approach for three-dimensional (3-D) numerical simulation and failure analysis of
rocks by taking into account the actual 3-D heterogeneity. Digital image techniques are adopted to extract two-dimensional
(2-D) material heterogeneity from material surface images. The 2-D image mesostructures are further extrapolated to 3-D cuboid
mesostructures by assuming the material surface as a representation of the inner material heterogeneity within a very small
depth. The iterative milling and scanning system is set up to generate the 3-D rock mesostructures. A Hong Kong granite specimen
is used as an example to demonstrate the procedure of 3-D mesostructure establishment. The mechanical responses and failure
process under the conventional Brazilian tensile test condition are examined through numerical analyses. The stress distribution,
crack propagation process and failure model of heterogeneous material cases are simulated with a finite difference software.
The numerical results indicate that material heterogeneity plays an important role in determining the failure behavior of
rocks under external loading. |
| |
| Keywords: | : Heterogeneous materials rock digital image processing numerical simulation finite difference method and failure prediction |
| 本文献已被 SpringerLink 等数据库收录！ |
