Analysing mixed mode (I-II) fracturing of concrete discs including chevron and straight-through notch cracks

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dc.contributor.authorErarslan, Nazife
dc.date.accessioned2025-01-06T17:36:56Z
dc.date.available2025-01-06T17:36:56Z
dc.date.issued2019
dc.description.abstractPre-existing cracks in concrete material and discontinuities in concrete structures are seldom subjected to pure tensile loading (mode I); rather, they are subjected to compressive, shear (mode II) or mixed mode loading (mode I-II). Cracked Chevron Notched Brazilian Disc (CCNBD) and Semi-Circular Brazilian (SCB) specimens including chevron notch and straight-through cracks were used in this research to analyse mixed mode fracturing of concrete. Both the experimental and numerical results showed that the crack initiation angle (theta) was found dependent on the crack inclination angle (beta). Moreover, CCNBD specimens with chevron notch crack geometry was found more suitable than the SCB geometry with straight-through notch crack to analyse mixed mode fracturing behaviour of plain concrete. However, using CCNBD or SCB specimens straight-through notch cracks may be more useful for testing the fracturing properties of coarse-grained concrete as sharp chevron cracks reduce the possible Fracture Process Zone (FPZ) size in front of the notch crack tip. Further analyses showed that the critical crack length is found as 13 mm (dimensionless notch length (alpha) = 0.5). Thus, it is understood that the unstable crack propagation starts between the initial chevron notch crack and final chevron notch crack length and it shows all experiments were done accurately. This outcome would be useful for concrete researches to obtain the yield point by using the relative analysis for finding where the unstable crack propagation starts. (C) 2019 Elsevier Ltd. All rights reserved.
dc.identifier.doi10.1016/j.ijsolstr.2019.03.005
dc.identifier.endpage92
dc.identifier.issn0020-7683
dc.identifier.issn1879-2146
dc.identifier.scopus2-s2.0-85062593685
dc.identifier.scopusqualityQ1
dc.identifier.startpage79
dc.identifier.urihttps://doi.org/10.1016/j.ijsolstr.2019.03.005
dc.identifier.urihttps://hdl.handle.net/20.500.14669/2029
dc.identifier.volume167
dc.identifier.wosWOS:000468711900008
dc.identifier.wosqualityQ1
dc.indekslendigikaynakWeb of Science
dc.indekslendigikaynakScopus
dc.language.isoen
dc.publisherPergamon-Elsevier Science Ltd
dc.relation.ispartofInternational Journal of Solids and Structures
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanı
dc.rightsinfo:eu-repo/semantics/openAccess
dc.snmzKA_20241211
dc.subjectCCNBD and SCB concrete specimens
dc.subjectMixed mode fracturing of concrete
dc.subjectFranc 2D and concrete
dc.titleAnalysing mixed mode (I-II) fracturing of concrete discs including chevron and straight-through notch cracks
dc.typeArticle

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