Characterisation of 3d fracture evolution in concrete using in-situ X-ray computed tomography testing and digital volume correlation

Zhenjun Yang, Wenyuan Ren, Mahmoud Mostafavi, Samuel A. Mcdonald, T. James Marrow

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    Abstract

    X-ray Computed Tomography (XCT) is a powerful technology that can accurately image the internal structures of composite and heterogeneous materials in three-dimensions (3D). In this study, in-situ micro XCT tests of concrete specimens under progressive compressive loading are carried out. The aim of the observations is to gain a better understanding of 3D fracture and failure mechanisms at the meso-scale. To characterise the fracture evolution as the deformation increases, two methods are used. The first segments the reconstructed absorption contrast XCT images using AVIZO software into different phases, namely, aggregates, mortar, cracks and voids. The second uses the digital volume correlation (DVC) technique to map the relative deformations between consecutive XCT images with high precision; bulk mechanical properties can be measured and cracks visualised via their opening displacement. The 3D crack profiles obtained by these two methods are compared, and the contributions that they can make to image-based modelling and its validation are noted.
    Original languageEnglish
    Title of host publicationProceedings of the 8th International Conference on Fracture Mechanics of Concrete and Concrete Structures, FraMCoS 2013|Proc. Int. Conf. Fract. Mech. Concr. Concr. Struct., FraMCoS
    Place of PublicationBarcelona, Spain
    PublisherInternational Center for Numerical Methods in Engineering (CIMNE)
    Pages236-242
    Number of pages6
    ISBN (Print)9788494100413
    Publication statusPublished - 2013
    Event8th International Conference on Fracture Mechanics of Concrete and Concrete Structures, FraMCoS 2013 - Toledo
    Duration: 1 Jul 2013 → …

    Conference

    Conference8th International Conference on Fracture Mechanics of Concrete and Concrete Structures, FraMCoS 2013
    CityToledo
    Period1/07/13 → …

    Keywords

    • Concrete in compression
    • Digital volume correlation
    • Fracture process zone
    • In-situ X-ray computed tomography
    • Segmentation
    • Three-dimensional fracture visualisation

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