Detection of metal fibres in cementitious composites based on signal and image processing approaches

0472580 - ÚFM 2017 RIV GR eng J - Journal Article
Vala, J. - Hobst, L. - Kozák, Vladislav
Detection of metal fibres in cementitious composites based on signal and image processing approaches.
WSEAS Transactions on Applied and Theoretical Mechanics. Roč. 10, č. 1 (2015), s. 39-46. ISSN 1991-8747
Institutional support: RVO:68081723
Keywords : Cementitious composites * Computational simulation * Non-destructive testing
Subject RIV: JI - Composite Materials

Mechanical properties of cementitious composites, reinforced by metal fibres, are conditioned by the volume fraction and distribution of directions of fibres. However, their reliable non-destructive or low-invasive experimental evaluation is a serious problem. The paper pays attention to four classes of such indirect methods. The first class relies on the planar X-ray imaging, with the discrete fast Fourier transform applied to image processing. The second one applies the magnetic approach, with certain electromagnetic alternative. The third one comes from the computed tomography, as an unique exact method for the detection of volume fraction without breaking the sample, with an information on (an)isotropy as a benefit. The last one is concentrated to the FEM modelling. Examples related to all sketched method from the experiments performed at the Brno University of Technology show the advantages and restrictions of particular approaches. © 2015, World Scientific and Engineering Academy and Society. All rights reserved.
Permanent Link: http://hdl.handle.net/11104/0269980