A four-way enhanced numerical manifold method for crack propagation and failure analysis of rock slopes
| Autor: | Duruo Huang, Gang Wang, Huo Fan |
|---|---|
| Rok vydání: | 2021 |
| Předmět: |
Applied Mathematics
Fracture mechanics Geometry 02 engineering and technology 01 natural sciences Displacement (vector) Numerical integration Stress (mechanics) 020303 mechanical engineering & transports Singularity Discontinuity (geotechnical engineering) 0203 mechanical engineering Modeling and Simulation 0103 physical sciences Gravitational singularity Rock mass classification 010301 acoustics Geology |
| Zdroj: | Applied Mathematical Modelling. 95:623-643 |
| ISSN: | 0307-904X |
| DOI: | 10.1016/j.apm.2021.02.025 |
| Popis: | A four-way enhanced numerical manifold method (NMM) is proposed in order to simulate crack propagation in rock media and progressive failure of jointed rock slopes. Specifically, the original NMM is improved in the following four aspects: (1) An “enriched local approximation” is employed to characterize singularity and discontinuity of the displacement/stress fields near the crack tip. (2) A “modified generalized Duffy transformation” is proposed to improve the accuracy of numerical integration associated with the 1/r and 1 / r singularities. (3) A “critical length cracking criterion” is introduced to determine propagation length and direction for both tensile-shear and compressive-shear cracks in rock mass. (4) A “cone-complementary-based contact formulation” is incorporated to resolve the cohesive/frictional contact phenomena between discontinuous interfaces more accurately. Some examples demonstrate the performance and application prospect of the presented NMM in stability and failure analysis of the jointed rock slopes. |
| Databáze: | OpenAIRE |
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