Open AccessINSTRUMENTATION OF FOUR-POINT BENDING TEST DURING 4D COMPUTED TOMOGRAPHY
Author(s) -
Daniel Kytýř,
Tomáš Fíla,
Petr Koudelka,
Ivana Kumpová,
Michal Vopálenský,
Leona Vavro,
Martin Vavro
Publication year - 2018
Publication title -
acta polytechnica ctu proceedings
Language(s) - English
Resource type - Journals
ISSN - 2336-5382
DOI - 10.14311/app.2018.18.0020
Subject(s) - bending , brittleness , three point flexural test , instrumentation (computer programming) , scanner , materials science , focus (optics) , fracture (geology) , point (geometry) , deformation (meteorology) , structural engineering , computer science , optics , engineering , composite material , physics , geometry , mathematics , artificial intelligence , operating system
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.