Instrumentation of four-point bending test during 4D computed tomography

0495160 - ÚTAM 2019 RIV CZ eng C - Conference Paper (international conference)
Kytýř, Daniel - Fíla, Tomáš - Koudelka_ml., Petr - Kumpová, Ivana - Vopálenský, Michal - Vavro, Leona - Vavro, Martin
Instrumentation of four-point bending test during 4D computed tomography.
Acta Polytechnica CTU Proceedings. Vol. 18. Prague: Czech Technical University in Prague, 2018 - (Kytýř, D.; Major, Z.; Doktor, T.), s. 20-23. ISBN 978-80-01-06474-0. E-ISSN 2336-5382.
[Youth Symposium on Experimental Solid Mechanics /16./. Traunkirchen (AT), 17.05.2018-19.05.2018]
R&D Projects: GA MŠMT(CZ) EF16_019/0000766
EU Projects: European Commission(XE) ATCZ38 - Com3d-XCT
Institutional support: RVO:68378297 ; RVO:68145535
Keywords : in-situ loading device * four-point bending * 4D micro-CT * crack propagation
OECD category: Applied mechanics; Applied mechanics (UGN-S)
https://ojs.cvut.cz/ojs/index.php/APP/article/view/5080/4794

High-resolution time-lapse micro-focus X-ray computed tomography is an effective method for investigation of deformation processes on volumetric basis including fracture propagation characteristics of non-homogeneous materials subjected to mechanical loading. This experimental method requires implementation of specifically designed loading devices to X-ray imaging setups. In case of bending tests, our background research showed that no commercial solution allowing for reliable investigation of so called fracture process zone in quasi-brittle materials is currently available. Thus, this paper is focused on description of recently developed in-situ four-point bending loading device and its instrumentation for testing of quasi-brittle materials. Proof of concept together with the pilot experiments were successfully performed in a CT scanner TORATOM. Based on results of the pilot experiments, we demonstrate that crack development and propagation in a quasi-brittle material can be successfully observed in 3D using high resolution 4D micro-CT under loading.
Permanent Link: http://hdl.handle.net/11104/0288173