Frictional crack initiation and propagation analysis using the numerical manifold method
By employing both a physical mesh and a mathematical mesh to formulate a physical problem, the numerical manifold method (NMM) can lead to a very simple meshing task, which allows directly capturing the discontinuities across the crack surfaces without further incorporating unknowns to the related n...
| Main Authors: | , |
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| Other Authors: | |
| Format: | Journal Article |
| Language: | English |
| Published: |
2013
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| Online Access: | https://hdl.handle.net/10356/96162 http://hdl.handle.net/10220/10832 |
| _version_ | 1826116888348852224 |
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| author | Wu, Zhijun Wong, Louis Ngai Yuen |
| author2 | School of Civil and Environmental Engineering |
| author_facet | School of Civil and Environmental Engineering Wu, Zhijun Wong, Louis Ngai Yuen |
| author_sort | Wu, Zhijun |
| collection | NTU |
| description | By employing both a physical mesh and a mathematical mesh to formulate a physical problem, the numerical manifold method (NMM) can lead to a very simple meshing task, which allows directly capturing the discontinuities across the crack surfaces without further incorporating unknowns to the related nodes through enrichment functions. These features enable the NMM to handle complex crack problems. In this study, based on the contact technique of the NMM and the incorporation of the Mohr–Coulomb crack initiation criterion, the effects of the friction and cohesion on the crack growth from a closed flaw (crack) under compression were investigated. A limited number of comparisons between the numerical results and the physical experiments show that with the Mohr–Coulomb crack initiation criterion, the NMM can not only accurately predict the pure tensile or pure shear crack growth, but the NMM can also satisfactorily predict the development of mixed shear–tensile crack types. Using a parametric analysis, the effects of the confining stress, the flaw inclination angle, the flaw friction angle and the material strengths on the crack development (crack initiation stress, crack initiation angle, crack type developed) have been investigated. |
| first_indexed | 2024-10-01T04:18:48Z |
| format | Journal Article |
| id | ntu-10356/96162 |
| institution | Nanyang Technological University |
| language | English |
| last_indexed | 2024-10-01T04:18:48Z |
| publishDate | 2013 |
| record_format | dspace |
| spelling | ntu-10356/961622020-03-07T11:43:38Z Frictional crack initiation and propagation analysis using the numerical manifold method Wu, Zhijun Wong, Louis Ngai Yuen School of Civil and Environmental Engineering DRNTU::Engineering::Civil engineering::Geotechnical By employing both a physical mesh and a mathematical mesh to formulate a physical problem, the numerical manifold method (NMM) can lead to a very simple meshing task, which allows directly capturing the discontinuities across the crack surfaces without further incorporating unknowns to the related nodes through enrichment functions. These features enable the NMM to handle complex crack problems. In this study, based on the contact technique of the NMM and the incorporation of the Mohr–Coulomb crack initiation criterion, the effects of the friction and cohesion on the crack growth from a closed flaw (crack) under compression were investigated. A limited number of comparisons between the numerical results and the physical experiments show that with the Mohr–Coulomb crack initiation criterion, the NMM can not only accurately predict the pure tensile or pure shear crack growth, but the NMM can also satisfactorily predict the development of mixed shear–tensile crack types. Using a parametric analysis, the effects of the confining stress, the flaw inclination angle, the flaw friction angle and the material strengths on the crack development (crack initiation stress, crack initiation angle, crack type developed) have been investigated. 2013-06-28T07:21:29Z 2019-12-06T19:26:28Z 2013-06-28T07:21:29Z 2019-12-06T19:26:28Z 2011 2011 Journal Article Wu, Z., & Wong, L. N. Y. (2012). Frictional crack initiation and propagation analysis using the numerical manifold method. Computers and Geotechnics, 39, 38-53. 0266-352X https://hdl.handle.net/10356/96162 http://hdl.handle.net/10220/10832 10.1016/j.compgeo.2011.08.011 en Computers and geotechnics © 2011 Elsevier Ltd. |
| spellingShingle | DRNTU::Engineering::Civil engineering::Geotechnical Wu, Zhijun Wong, Louis Ngai Yuen Frictional crack initiation and propagation analysis using the numerical manifold method |
| title | Frictional crack initiation and propagation analysis using the numerical manifold method |
| title_full | Frictional crack initiation and propagation analysis using the numerical manifold method |
| title_fullStr | Frictional crack initiation and propagation analysis using the numerical manifold method |
| title_full_unstemmed | Frictional crack initiation and propagation analysis using the numerical manifold method |
| title_short | Frictional crack initiation and propagation analysis using the numerical manifold method |
| title_sort | frictional crack initiation and propagation analysis using the numerical manifold method |
| topic | DRNTU::Engineering::Civil engineering::Geotechnical |
| url | https://hdl.handle.net/10356/96162 http://hdl.handle.net/10220/10832 |
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