Time lapse tomography of fracture progress in silicate-based composite subjected to the loading a combination with acoustic emission scanning

0464994 - ÚTAM 2017 RIV IT eng O - Others
Kumpová, Ivana - Kytýř, Daniel - Fíla, Tomáš - Veselý, V. - Trčka, T. - Vopálenský, Michal - Vavřík, Daniel
Time lapse tomography of fracture progress in silicate-based composite subjected to the loading a combination with acoustic emission scanning.
2016. XVth Youth Symposium on Experimental Solid Mechanics.
R&D Projects: GA ČR(CZ) GA15-07210S
Institutional support: RVO:68378297
Keywords : three point bending test * computed tomography * X-ray dynamic defectoscopy * silicate composite * fracture process zone * acoustic emission
Subject RIV: JL - Materials Fatigue, Friction Mechanics

The initiation and propagation of a fracture in quasi-brittle materials (such as silicatebased composite) is an increasingly discussed topic for which various methods of research have been developed/applied. As the quasi-brittle silicate-based composite compounds are very non-homogenous, the mechanism of the crack initiation and propagation can be very different even for samples with the identical geometry. One possible approach to study the fracture mechanism in quasi-brittle materials is to use several different experimental techniques in a single experiment and perform detail analysis to identify generally valid fracture process phenomena. In this work, a simultaneous monitoring of fracture process zone formation and propagation by three different methods is presented and discussed. A three point bending test was performed on a notched silicate composite specimen. During the loading process, a highly accurate force displacement dependence was recorded accompanied with X-ray radiography, X-ray computed tomogra-phy and acoustic emission scanning.
Permanent Link: http://hdl.handle.net/11104/0263726