Three-dimensional shape characterization and particle reconstruction using tomography for granular materials

D. Barrot, J. Corriveau, P. Giordano, Shreekanth Mandayam, Beena Sukumaran

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

The strong dependence of shear and flow behavior of granular materials on particle morphology is a well known fact. Quantification of three dimensional shapes yields a useful tool to investigate the correlation between particle morphology and shear behavior. Particle regeneration of realistic shapes in a discrete element program is also critical if a good understanding of micromechanics of granular media is required. This paper describes three-dimensional shape descriptors that can be used to describe morphology of particle aggregates as well as particle reconstruction techniques utilizing tomographic principles. The paper demonstrates that a single set of numbers representing a composite three-dimensional shape can be used to characterize all the varying three-dimensional shapes of similar particles in an aggregate mix. The composite shape is obtained by subdividing the problem into a judicious combination of simple techniques - two-dimensional shape description using Fourier and/or invariant moment descriptors, feature extraction using principal component analysis, statistical modeling and projective reconstruction. Results demonstrating the consistency, separability and uniqueness of the three-dimensional shape descriptor algorithms are presented. The paper also attempts to synthesize composite 3-D granular particles from statistically obtained 3-D shape descriptors of the particles in a granular particle mixture using Algebraic Reconstruction Technique. The paper also attempts to validate the premise that multiple projective representations of multiple particles could be used to synthesize a composite 3-D particle that represents the entire mixture in terms of its 3-D shape descriptors. Validation of the premise is attempted by investigating the statistical similarity between the regenerated particle using multiple projective representations of multiple particles and multiple projective representations of a single particle using optical and X-ray tomography techniques. This research work proves useful for generating realistic shapes for discrete element applications.

Original languageEnglish (US)
Title of host publicationProceedings of the International Symposium on Geomechanics and Geotechnics of Particulate Media - Geomechanics and Geotechnics of Particulate Media
Pages85-90
Number of pages6
StatePublished - Dec 1 2006
EventInternational Symposium on Geomechanics and Geotechnics of Particulate Media - Geomechanics and Geotechnics of Particulate Media - Ube, Yamaguchi, Japan
Duration: Sep 12 2006Sep 14 2006

Publication series

NameProceedings of the International Symposium on Geomechanics and Geotechnics of Particulate Media - Geomechanics and Geotechnics of Particulate Media

Other

OtherInternational Symposium on Geomechanics and Geotechnics of Particulate Media - Geomechanics and Geotechnics of Particulate Media
CountryJapan
CityUbe, Yamaguchi
Period9/12/069/14/06

All Science Journal Classification (ASJC) codes

  • Geotechnical Engineering and Engineering Geology

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