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Article: Influence of flaw inclination angle and loading condition on crack initiation and propagation

TitleInfluence of flaw inclination angle and loading condition on crack initiation and propagation
Authors
KeywordsFinite element method
AUTODYN
Pre-existing flaw inclination angle
Non-linear dynamics method
Magnitude of pressure boundary
Loading rate
Issue Date2012
Citation
International Journal of Solids and Structures, 2012, v. 49, n. 18, p. 2482-2499 How to Cite?
AbstractWith reference to the experimental observation of crack initiation and propagation from pre-existing flaws in rock specimens under compression, the influences of pre-existing flaw inclination angle on the cracking processes were analyzed by means of finite element method (FEM) and non-linear dynamics method. FEM analysis on the stress field distribution induced by the presence of a pre-existing flaw provided better understanding for the influence of flaw inclination angle on the initiation position and initiation angle of the potential cracks. Numerical analysis based on the non-linear dynamics method was performed to simulate the cracking processes. The resultant crack types, crack initiation sequences and the overall crack pattern were different under different loading conditions. Under a relatively low loading rate or a small magnitude of maximum loading pressure, tensile cracks would tend to initiate prior to shear cracks. In contrast, under a relatively high loading rate and a large magnitude of maximum loading pressure, shear cracks would tend to initiate prior to tensile cracks instead. © 2012 Elsevier Ltd. All rights reserved.
Persistent Identifierhttp://hdl.handle.net/10722/213973
ISSN
2015 Impact Factor: 2.081
2015 SCImago Journal Rankings: 1.597

 

DC FieldValueLanguage
dc.contributor.authorLi, Huanqiang-
dc.contributor.authorWong, Louis Ngai Yuen-
dc.date.accessioned2015-08-19T13:41:24Z-
dc.date.available2015-08-19T13:41:24Z-
dc.date.issued2012-
dc.identifier.citationInternational Journal of Solids and Structures, 2012, v. 49, n. 18, p. 2482-2499-
dc.identifier.issn0020-7683-
dc.identifier.urihttp://hdl.handle.net/10722/213973-
dc.description.abstractWith reference to the experimental observation of crack initiation and propagation from pre-existing flaws in rock specimens under compression, the influences of pre-existing flaw inclination angle on the cracking processes were analyzed by means of finite element method (FEM) and non-linear dynamics method. FEM analysis on the stress field distribution induced by the presence of a pre-existing flaw provided better understanding for the influence of flaw inclination angle on the initiation position and initiation angle of the potential cracks. Numerical analysis based on the non-linear dynamics method was performed to simulate the cracking processes. The resultant crack types, crack initiation sequences and the overall crack pattern were different under different loading conditions. Under a relatively low loading rate or a small magnitude of maximum loading pressure, tensile cracks would tend to initiate prior to shear cracks. In contrast, under a relatively high loading rate and a large magnitude of maximum loading pressure, shear cracks would tend to initiate prior to tensile cracks instead. © 2012 Elsevier Ltd. All rights reserved.-
dc.languageeng-
dc.relation.ispartofInternational Journal of Solids and Structures-
dc.subjectFinite element method-
dc.subjectAUTODYN-
dc.subjectPre-existing flaw inclination angle-
dc.subjectNon-linear dynamics method-
dc.subjectMagnitude of pressure boundary-
dc.subjectLoading rate-
dc.titleInfluence of flaw inclination angle and loading condition on crack initiation and propagation-
dc.typeArticle-
dc.description.natureLink_to_subscribed_fulltext-
dc.identifier.doi10.1016/j.ijsolstr.2012.05.012-
dc.identifier.scopuseid_2-s2.0-84863986720-
dc.identifier.hkuros259294-
dc.identifier.volume49-
dc.identifier.issue18-
dc.identifier.spage2482-
dc.identifier.epage2499-

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