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| Ertürk, Emre |
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| Taccardi, Nicola |
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| Alshaaer, Mazen | Brussels |
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| Kočí, Jan | Prague |
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| Ollier, Nadège |
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| Azevedo, Nuno Monteiro |
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| Landes, Michael |
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| Rignanese, Gian-Marco |
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Margetts, Lee
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (10/10 displayed)
- 2024Actionable workflows for fusion neutronics simulation.
- 2021Non-local modelling of heat conduction with phase change
- 20204D characterisation of damage and fracture mechanisms of ultra high performance fibre reinforced concrete by in-situ micro X-Ray computed tomography testscitations
- 20184D Imaging of Soft Tissue and Implanted Biomaterial Mechanics; A Barbed-Suture Case Study for Tendon Repaircitations
- 2018Modelling fracture in heterogeneous materials on HPC systems using a hybrid MPI/Fortran coarray multi-scale CAFE frameworkcitations
- 2018Multiscale CAFE for fracture in heterogeneous materials under dynamic loading conditions
- 2017Multi-scale CAFE framework for simulating fracture in heterogeneous materials implemented in fortran co-arrays and MPIcitations
- 2017Micro X-ray Computed Tomography Image-based Two-scale Homogenisation of Ultra High Performance Fibre Reinforced Concretecitations
- 2009A finite element approach to the biomechanics of dromaeosaurid dinosaur claws
- 2008Investigating predictive capabilities of image-based modeling for woven composites in a scalable computing environment
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article
4D characterisation of damage and fracture mechanisms of ultra high performance fibre reinforced concrete by in-situ micro X-Ray computed tomography tests
Abstract
In-situ microscale X-ray computed tomography (μXCT) tests of ultra high performance fibre reinforced concrete (UHPFRC) specimens were conducted under progressive wedge-split loading for the first time. A sequence of μXCT images of two 40 × 20 × 25 mm notched specimens were obtained at different loads with a voxel resolution of 16.9μm. Through 3D image processing, the UHPFRC's internal microstructures are characterised and the complicated damage and fracture mechanisms are visualised, including bridging, bending and pull-out of fibres, spalling and fracture of matrix, and evolution of micro-cracks into macro-cracks. The deformed μXCT images clearly show the significant effects of steel fibres: suppressing microcracks from propagation, leading to dispersed multiple cracks, and contributing to deviate the originally vertical crack towards the overall fibre orientation across the cracks. It is concluded the in-situ μXCT tests provide an unrivalled tool for elucidation of complicated damage and fracture evolution in UHPFRC with high-resolution 3D images that will be invaluable for validation of numerical models and optimisation of the material's micro-structures.