In-situ X-ray computed tomography characterisation of 3D fracture evolution and image-based numerical homogenisation of concrete

Z. Yang, W. Ren, R. Sharma, S. Mcdonald, M. Mostafavi, Y. Vertyagina, T.J. Marrow

Research output: Contribution to journalArticle (Academic Journal)peer-review

86 Citations (Scopus)
396 Downloads (Pure)

Abstract

In-situ micro X-ray Computed Tomography (XCT) tests of concrete cubes under progressive compressive loading were carried out to study 3D fracture evolution. Both direct segmentation of the tomography and digital volume correlation (DVC) mapping of the displacement field were used to characterise the fracture evolution. Realistic XCT-image based finite element (FE) models under periodic boundaries were built for asymptotic homogenisation of elastic properties of the concrete cube with Young's moduli of cement and aggregates measured by micro-indentation tests. It is found that the elastic moduli obtained from the DVC analysis and the FE homogenisation are comparable and both within the Reuss-Voigt theoretical bounds, and these advanced techniques (in-situ XCT, DVC, micro-indentation and image-based simulations) offer highly-accurate, complementary functionalities for both qualitative understanding of complex 3D damage and fracture evolution and quantitative evaluation of key material properties of concrete.
Original languageEnglish
Pages (from-to)74-83
Number of pages10
JournalCement & Concrete Composites
Volume75
Early online date5 Oct 2016
DOIs
Publication statusPublished - Jan 2017

Keywords

  • X-ray computed tomography
  • Fracture
  • Segmentation
  • Digital volume correlation
  • Homogenisation
  • Concrete

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