Please use this identifier to cite or link to this item: http://bura.brunel.ac.uk/handle/2438/13464
Title: Experimental and numerical investigations on fracture process zone of rock-concrete interface
Authors: Dong, W
Yang, D
Zhou, X
Kastiukas, G
Zhang, B
Keywords: rock-concrete interface;interfacial fracture;FPZ evolution;crack propagation;numerical simulation
Issue Date: 22-Nov-2016
Publisher: Wiley
Citation: Dong, W. et al. (2017) 'Experimental and numerical investigations on fracture process zone of rock-concrete interface', Fatigue and Fracture of Engineering Materials and Structures, 40 (5), pp 820 - 835. doi: 10.1111/ffe.12558.
Abstract: A crack propagation criterion for a rock-concrete interface is employed to investigate the evolution of the fracture process zone (FPZ) in rock-concrete composite beams under three-point bending (TPB). According to the criterion, cracking initiates along the interface when the difference between the mode I stress intensity factor (SIF) at the crack tip caused by external loading and the one caused by the cohesive stress acting on the fictitious crack surfaces reaches the initial fracture toughness of a rock-concrete interface. From the experimental results of the composite beams with various initial crack lengths but equal depths under TPB, the interface fracture parameters are determined. In addition, the FPZ evolution in a TPB specimen is investigated by using a digital image correlation (DIC) technique. Thus, the fracture processes of the rock-concrete composite beams can be simulated by introducing the initial fracture criterion to determine the crack propagation. By comparing the load versus crack mouth opening displacement (CMOD) curves and FPZ evolution, the numerical and experimental results show a reasonable agreement, which verifies the numerical method developed in this study for analysing the crack propagation along the rock-concrete interface. Finally, based on the numerical results, the effect of ligament length on the FPZ evolution and the variations of the fracture model during crack propagation are discussed for the rock-concrete interface fracture under TPB. The results indicate that ligament length significantly affects the FPZ evolution at the rock-concrete interface under TPB, and the stress intensity factor ratio of mode II to I is influenced by the specimen size during the propagation of the interfacial crack.
URI: https://bura.brunel.ac.uk/handle/2438/13464
DOI: https://doi.org/10.1111/ffe.12558
ISSN: 8756-758X
Other Identifiers: ORCID iD: Gediminas Kastiukas https://orcid.org/0000-0002-6148-995X
ORCID iD: Xiangming Zhou https://orcid.org/0000-0001-7977-0718
Appears in Collections:Dept of Civil and Environmental Engineering Research Papers

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FullText.pdfCopyright © 2016 Wiley. This is the peer reviewed version of the following article: Dong, W. et al. (2017) 'Experimental and numerical investigations on fracture process zone of rock-concrete interface', Fatigue and Fracture of Engineering Materials and Structures, 40 (5), pp 820 - 835, which has been published in final form at https://doi.org/10.1111/ffe.12558. This article may be used for non-commercial purposes in accordance with Wiley Terms and Conditions for Use of Self-Archived Versions (see: https://authorservices.wiley.com/author-resources/Journal-Authors/licensing/self-archiving.html).1.26 MBAdobe PDFView/Open


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