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Quantitative Evaluation of Particle Morphology

O'Sullivan, C., Cavarretta, I., Fonseca, J. ORCID: 0000-0002-7654-6005 and Altuhafi, F. (2013). Quantitative Evaluation of Particle Morphology. Paper presented at the Workshop on Experimental Micromechanics for Geomaterials (ISSMGE TC101-TC105), 23-5-2013 - 24-5-2013, Hong Kong.

Abstract

In geomechanics research shape is most often qualitatively assessed. Various definitions on how to quantify shape have been applied in the literature. This paper assesses the feasibility of applying these definitions to digital images of sand grains. Firstly the way in which size can be calculated from these digital images is discussed, then the sphericity and convexity definitions proposed by Sympatec (2008) are considered. These definitions of sphericity and convexity (SQP, Cx) are relatively easy to apply. By relating SQP and Cx to the qualitative measures of particle shape that are most often used in geotechnical sample description, we argue that there is significant scope to introduce these measures to engineering practice (Altuhafi et al., 2012). We show that distributions of convexity and sphericity obtained in 2D and 3D analyses differ.

Publication Type: Conference or Workshop Item (Paper)
Departments: School of Mathematics, Computer Science & Engineering > Engineering
URI: http://openaccess.city.ac.uk/id/eprint/19281
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