7-11 July 2014
Africa/Johannesburg timezone
<a href="http://events.saip.org.za/internalPage.py?pageId=16&confId=34"><font color=#0000ff>SAIP2014 Proceedings published on 17 April 2015</font></a>

A study of crack formation and its effective internal surface area using Micro-Focus X-ray Tomography (µX-CT) and Fractal Geometry.

8 Jul 2014, 14:00
20m
D Les 202

D Les 202

Oral Presentation Track A - Division for Physics of Condensed Matter and Materials DPCMM2

Speaker

Ms Teffo Seakamela (University of Johannesburg)

Abstract content <br> &nbsp; (Max 300 words)<br><a href="http://events.saip.org.za/getFile.py/access?resId=0&materialId=0&confId=34" target="_blank">Formatting &<br>Special chars</a>

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.

Would you like to <br> submit a short paper <br> for the Conference <br> Proceedings (Yes / No)?

Yes

Main supervisor (name and email)<br>and his / her institution

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

Apply to be<br> considered for a student <br> &nbsp; award (Yes / No)?

yes

Level for award<br>&nbsp;(Hons, MSc, <br> &nbsp; PhD)?

MSc

Primary author

Ms Teffo Seakamela (University of Johannesburg)

Co-authors

Dr Bryan Doyle (University of Johannesburg) Mr Frikkie de Beer (NECSA) Dr Gawie Nothnagel (NECSA)

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