7-11 July 2014
Africa/Johannesburg timezone
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A study of crack formation and its effective internal surface area using Micro-Focus X-ray Tomography (µX-CT) and Fractal Geometry.

Presented by Ms. Teffo SEAKAMELA on 8 Jul 2014 from 14:00 to 14:20
Type: Oral Presentation
Session: DPCMM2
Track: Track A - Division for Physics of Condensed Matter and Materials

Abstract

Micro-Focus X-ray Tomography (µX-CT), as non-destructive analytical technique, has been applied to obtain a virtual three dimensional image (tomogram) of material at a scale as low as 3 μm. VGStudioMAX and Image-J analytical software have been applied to extract quantitative information from the tomograms at 2D planes inside the samples where natural crack formation occurred due to stresses being applied to the sample. The nature of crack formation has been investigated on different samples and has been tested against known criteria whether the morphology of the cracks follows a fractal geometry pattern. This study focuses on coal,small and large bricks and smooth concrete and investigated the roughness of cracks within these structures to determine its fractal geometry correlation. It was found that the fracture surfaces of the mentioned samples follow fractal behavior in a wide range of length scale. The concept of fractal geometry and results obtained will be presented.

Award

yes

Level

MSc

Supervisor

Dr B.P. Doyle, bpdoyle@uj.ac.za,University of Johannesburg

Paper

Yes

Place

Room: D Les 202


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