An Application of Meshless Methods in Modeling of Damaged Rock Masses
A two-dimensional code coupling Element-Free Galerkin Method (EFGM) and Finite Elements Method (FEM) as described by Belytschko et al. (1995) is used to simulate the behavior of elasto-damaged materials. The EFGM is used in some regions of interest and the FEM in the other parts. Two damage models are implemented and tested. The first is a continuum damage model as described by Homand et al. (1998). The second is a micromechanical damage model based on the works of Kachanov (1982, 1994) and those of Nemat-Nasser & Obata (1988). Some simulations of laboratory tests using the micromechanical model are performed to check its applicability. Then the damage around a circular gallery was studied using the two models.
KeywordsCrack Length Elementary Representative Volume Damage Model Stress Intensity Factor Damage Zone
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