SAIP2014
Contribution ID:96 Type:Oral Presentation
A study of crack formation and its effective internal surface area using Micro-Focus X-ray Tomography
(µX-CT) and Fractal Geometry.
Tuesday, 8 July 2014 14:00 (20 minutes)
Abstract content <br> (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.
Apply to be<br> considered for a student <br> award (Yes / No)?
yes
Level for award<br> (Hons, MSc, <br> PhD)?
MSc
Main supervisor (name and email)<br>and his / her institution
Dr B.P. Doyle, [email protected],University of Johannesburg
Would you like to <br> submit a short paper <br> for the Conference <br> Pro- ceedings (Yes / No)?
Yes
Primary author: Ms SEAKAMELA, Teffo (University of Johannesburg)
Co-authors: Dr DOYLE, Bryan (University of Johannesburg);Mr DE BEER, Frikkie (NECSA);Dr NOTHNAGEL, Gawie (NECSA)
Presenter: Ms SEAKAMELA, Teffo (University of Johannesburg) Session Classification: DPCMM2
Track Classification: Track A - Division for Physics of Condensed Matter and Materials
