caa a22 4500 463174895 CHVBK 20180406164823.0 cr unu---uuuuu 170326e20070401xx s 000 0 eng 10.1007/s00603-006-0105-8 doi (NATIONALLICENCE)springer-10.1007/s00603-006-0105-8 Digital Image Based Approach for Three-Dimensional Mechanical Analysis of Heterogeneous Rocks [Elektronische Daten] [S. Chen, Z. Q. Yue, L. G. Tham] 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. Springer-Verlag, 2006 Keywords: Heterogeneous materials, rock, digital image processing, numerical simulation, finite difference method, and failure prediction nationallicence Chen S. Department of Civil Engineering, The University of Hong Kong, Hong Kong, P.R. China aut Yue Z. Q. Department of Civil Engineering, The University of Hong Kong, Hong Kong, P.R. China aut Tham L. G. Department of Civil Engineering, The University of Hong Kong, Hong Kong, P.R. China aut Rock Mechanics and Rock Engineering Springer-Verlag 40/2(2007-04-01), 145-168 0723-2632 40:2<145 2007 40 603 https://doi.org/10.1007/s00603-006-0105-8 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s00603-006-0105-8 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Chen S. Department of Civil Engineering, The University of Hong Kong, Hong Kong, P.R. China aut NATIONALLICENCE 700 1- Yue Z. Q. Department of Civil Engineering, The University of Hong Kong, Hong Kong, P.R. China aut NATIONALLICENCE 700 1- Tham L. G. Department of Civil Engineering, The University of Hong Kong, Hong Kong, P.R. China aut NATIONALLICENCE 773 0- Rock Mechanics and Rock Engineering Springer-Verlag 40/2(2007-04-01), 145-168 0723-2632 40:2<145 2007 40 603 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer