X-ray dynamic observation of the evolution of the fracture process zone in a quasi-brittle specimen

0446819 - ÚTAM 2016 RIV GB eng J - Journal Article
Kumpová, Ivana - Fíla, Tomáš - Vavřík, Daniel - Keršner, Z.
X-ray dynamic observation of the evolution of the fracture process zone in a quasi-brittle specimen.
Journal of Instrumentation. Roč. 10, č. 8 (2015), C08004. ISSN 1748-0221. E-ISSN 1748-0221
R&D Projects: GA MK(CZ) DF11P01OVV001
Keywords : inspection with x-rays * detection of defects * fracture
Subject RIV: AL - Art, Architecture, Cultural Heritage
Impact factor: 1.310, year: 2015
http://iopscience.iop.org/1748-0221/10/08/C08004/pdf/1748-0221_10_08_C08004.pdf

The aim of this work is the evaluation of the fracture process zone while loading a quasi-brittle concrete compound. The regularly used optical observation of the specimen surface does not provide accurate information regarding the fracture zone shape, particularly when this zone is tunnelled inside of the specimen body. Therefore, X-ray dynamic defectoscopy and computed tomography were employed as tools for an extended investigation of process zone evolution. A notched specimen manufactured from silicate composite was subjected to the three-point bending test in a special table-top loading device. On-line radiographic observation of the process zone during the loading experiment serves for overall evaluation, while a tomographic measurement - which is conducted during temporal loading interruption - provides information about the spatial distribution of the newly developed cracks.
Permanent Link: http://hdl.handle.net/11104/0248784