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Article: Frictional crack initiation and propagation analysis using the numerical manifold method

TitleFrictional crack initiation and propagation analysis using the numerical manifold method
Authors
KeywordsCrack initiation criterion
Tensile wing crack
Stress intensity factor
Secondary crack
Partition of unity method
Numerical manifold method
Issue Date2012
Citation
Computers and Geotechnics, 2012, v. 39, p. 38-53 How to Cite?
AbstractBy 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. © 2011 Elsevier Ltd.
Persistent Identifierhttp://hdl.handle.net/10722/213954
ISSN
2015 Impact Factor: 1.705
2015 SCImago Journal Rankings: 2.033

 

DC FieldValueLanguage
dc.contributor.authorWu, Zhijun-
dc.contributor.authorWong, Louis Ngai Yuen-
dc.date.accessioned2015-08-19T13:41:21Z-
dc.date.available2015-08-19T13:41:21Z-
dc.date.issued2012-
dc.identifier.citationComputers and Geotechnics, 2012, v. 39, p. 38-53-
dc.identifier.issn0266-352X-
dc.identifier.urihttp://hdl.handle.net/10722/213954-
dc.description.abstractBy 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. © 2011 Elsevier Ltd.-
dc.languageeng-
dc.relation.ispartofComputers and Geotechnics-
dc.subjectCrack initiation criterion-
dc.subjectTensile wing crack-
dc.subjectStress intensity factor-
dc.subjectSecondary crack-
dc.subjectPartition of unity method-
dc.subjectNumerical manifold method-
dc.titleFrictional crack initiation and propagation analysis using the numerical manifold method-
dc.typeArticle-
dc.description.natureLink_to_subscribed_fulltext-
dc.identifier.doi10.1016/j.compgeo.2011.08.011-
dc.identifier.scopuseid_2-s2.0-80053363157-
dc.identifier.hkuros259297-
dc.identifier.volume39-
dc.identifier.spage38-
dc.identifier.epage53-

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