PSI - Issue 43

Available online at www.sciencedirect.com Available online at www.sciencedirect.com ScienceDirect Structural Integrity Procedia 00 (2022) 000 – 000 Available online at www.sciencedirect.com ScienceDirect Structural Integrity Procedia 00 (2022) 000 – 000

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ScienceDirect

Procedia Structural Integrity 43 (2023) 124–129

© 2023 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0) Peer-review under the responsibility of MSMF10 organizers. © 20 23 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/) Peer-review under the responsibility of MSMF10 organizers. Abstract This contribution deals with the analysis o fatigue damage in high-performanc concrete (HPC) studied by thre -point bending test. The concrete sample was tested with frequency of 10 Hz and it was exp sed t t tal numb r of load cycl s 2  10 6 . Th internal structure and damage localization was studied by  CT tomography. Found locations of internal damage i.e., cracks, were discussed. © 20 23 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/) Peer-review under the responsibility of MSMF10 organizers. 10th International Conference on Materials Structure and Micromechanics of Fracture High-cycle fatigue cracks in concrete investigated by μ CT tomography Petr Miarka a,b* , Stanislav Seitl a,b , Jan Klusák a , Lucie Malíková a,b , Ildiko Merta c and Vlastimil Bílek d a Institute of Physics of Materials, Czech Academy of Science, Žižkova 22, 616 00 Brno, Czech Republic b Brno University of Technology, Faculty of Civil Engineering, Veveří 331/95, 602 00 Brno, Czech Republic c TU Wien, Faculty of Civil Engineering, Karlsplatz 13/E207-1, 1040 Vienna, Austria d Faculty of Civil Engineering, Technical University of Ostrava, L. Podéště 1875/17, 708 33 Ostrava, Czech Republic Abstract This contribution deals with the analysis of fatigue damage in high-performance concrete (HPC) studied by three-point bending test. The concrete sample was tested with frequency of 10 Hz and it was exposed to a total number of load cycles 2  10 6 . The internal structure and damage localization was studied by  CT tomography. Found locations of internal damage i.e., cracks, were discussed. 10th International Conference on Materials Structure and Micromechanics of Fracture High-cycle fatigue cracks in concrete investigated by μ CT tomography Petr Miarka a,b* , Stanislav Seitl a,b , Jan Klusák a , Lucie Malíková a,b , Ildiko Merta c and Vlastimil Bílek d a Institute of Physics of Materials, Czech Academy of Science, Žižkova 22, 616 00 Brno, Czech Republic b Brno University of Technology, Faculty of Civil Engineering, Veveří 331/95, 602 00 Brno, Czech Republic c TU Wien, Faculty of Civil Engineering, Karlsplatz 13/E207-1, 1040 Vienna, Austria d Faculty of Civil Engineering, Technical University of Ostrava, L. Podéště 1875/17, 708 33 Ostrava, Czech Republic 1. Introduction Fatigue is defined as a process of progressive, permanent changes in the internal material’s structure due to the exposure to repeated/cyclic loading. Repeated load is mainly present on structures like bridges, railway sleepers, machine foundations, highway/runway slabs, etc. Lee & Barr (2004). For materials like concrete or mortar, these 1. Introduction Fatigue is defin as a process of progressive, permane t chang s in the internal material’s structure due to the exposure to repeated/cyclic loadi g. Repeated load is mainly present on structures like bridges, railway sleepers, machine foundations, highway/runway slabs, etc. Lee & Barr (2004). For materials like concrete or mortar, these Keywords: Fatigue; concrete; HPC; CT tomography. Keywords: Fatigue; concrete; HPC; CT tomography.

* Corresponding author. Tel.: +4-205-322-0430. E-mail address: petr.miarka@vut.cz * Correspon ing author. Tel.: +4-205-322-0430. E-mail address: petr.miarka@vut.cz

2452-3216 © 2023 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0) Peer-review under the responsibility of MSMF10 organizers. 2452-3216 © 2023 The Authors. Published by Elsevier B.V. This is an ope access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0) Peer-review under the responsibility of MSMF10 organizers.

2452-3216 © 2023 The Authors. Published by ELSEVIER B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0) Peer-review under the responsibility of MSMF10 organizers. 10.1016/j.prostr.2022.12.246