Please use this identifier to cite or link to this item: http://buratest.brunel.ac.uk/handle/2438/14421
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dc.contributor.authorDong, W-
dc.contributor.authorWu, Z-
dc.contributor.authorZhou, X-
dc.contributor.authorWang, C-
dc.date.accessioned2017-04-19T15:05:57Z-
dc.date.available2016-06-01-
dc.date.available2017-04-19T15:05:57Z-
dc.date.issued2016-
dc.identifier.citationEngineering Fracture Mechanics, 158: pp. 39 - 58, (2016)en_US
dc.identifier.issn1873-7315-
dc.identifier.urihttp://bura.brunel.ac.uk/handle/2438/14421-
dc.description.abstractIn the analysis of mode-I crack propagation of normal strength concrete at a crack tip, the initial fracture toughness and nil-stress intensity factor (nil-SIF) are two distinguished and widely adopted types of crack propagation criteria. However, there is little information reported on the difference resulting from the two criteria when they are employed to analyze concrete with different strength grades. Aiming at this objective, three-point bending tests are carried out on notched concrete beams of five strength grades, i.e. C20, C40, C60, C80 and C100, and an arrange of initial crack length/depth ratios as 0.2, 0.3 and 0.4, to investigate initial fracture toughness, fracture energy and load–crack mouth opening displacement (P–CMOD) relationship. Meanwhile, the three-point bending tests are also conducted on notched concrete beams of four specimen heights, i.e. 60, 90, 120, and 150 mm. The two aforementioned types of concrete crack propagation criteria are introduced to determine crack propagation and predict the P–CMOD curves of a series of notched concrete beams under a three-point bending test. It has been found that the P–CMOD curves calculated using the initial fracture toughness criterion show a better agreement with experimental results than the ones calculated using the nil SIF criterion. With the increase of concrete strength, the difference between the peak loads from experiment and those from analyses based on the nil-SIF criterion becomes increasingly larger than the scenarios based on the initial fracture toughness criterion. Therefore, it can be reasonably concluded that for the two types of concrete crack propagation criteria, the initial fracture toughness is more appropriate for describing the fracture behavior of concrete, especially for high strength concrete.en_US
dc.description.sponsorshipThe financial support of the, the National Natural Science Foundation of China under the Grant of NSFC 51478084, 51421064 and 51478083, and the fundamental research funds for the Central Universities under the Grant of DUT14LK06 is gratefully acknowledged.en_US
dc.format.extent39 - 58 (20)-
dc.languageEnglish-
dc.language.isoenen_US
dc.publisherElsevieren_US
dc.subjectConcreteen_US
dc.subjectMode-I fractureen_US
dc.subjectCrack propagation processen_US
dc.subjectCrack propagation criterionen_US
dc.subjectInitial fracture toughnessen_US
dc.titleA comparative study on two stress intensity factor-based criteria for prediction of mode-I crack propagation in concreteen_US
dc.typeArticleen_US
dc.identifier.doihttp://dx.doi.org/10.1016/j.engfracmech.2016.02.051-
dc.relation.isPartOfEngineering Fracture Mechanics-
pubs.publication-statusPublished-
pubs.volume158-
Appears in Collections:Dept of Mechanical Aerospace and Civil Engineering Research Papers

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