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.
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 language | English |
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| Number of pages | 7 |
| Publication status | Published - 2013 |
| Externally published | Yes |
| Event | VIII International Conference on Fracture Mechanics of Concrete and Concrete Structures - Toledo, Spain Duration: 10 Mar 2013 → 14 Mar 2013 |
Conference
| Conference | VIII International Conference on Fracture Mechanics of Concrete and Concrete Structures |
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| Country/Territory | Spain |
| City | Toledo |
| Period | 10/03/13 → 14/03/13 |
Keywords
- In-situ X-ray computed tomography
- Concrete in compression
- Three-dimensional fracture visualisation
- Fracture process zone
- Segmentation
- Digital volume correlation