Fast fourier transforms applied to shape analysis of particle silhouettes to obtain morphological data

Meloy, T.P.

doi:10.1016/0032-5910(77)85040-7

Cited by 73 publications

(18 citation statements)

References 4 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The eŠect of particle shape on the properties of soils was discussed by several investigators (Koerner, 1970;Holubec and D'Appolonia, 1973;Kezdi, 1974;Ng, 1999). A Fourier analysis is a very useful method for quantifying particle shape and texture (Meloy, 1977;Masad and Button, 2000). While Barret's study (1980) separated the parameters deˆning the roughness of rocks as form factors, roundness, and roughness, Bowman et al (2001) deˆned particle roughness using a descriptive number.…”

Section: Shape Characterization and The Shear Strength Of Sandsmentioning

confidence: 99%

Relationships between Shape Characteristics and Shear Strength of Sands

Sezer

Altun

Göktepe³

2011

Soils and Foundations

View full text Add to dashboard Cite

In the Mohr-Coulomb criterion, the shear strength of sands is typically characterized by the internal friction angle, which depends on many factors such as grain size and distribution, the mineralogical origin of the particles, particle shape, unit weight, geological history, cementation, saturation, and overburden pressure. In this study, the empirical relationships among three particle shape indices, diŠerent fractal dimension deˆnitions, and internal friction angles were investigated. Within this context, direct shear tests were conducted on 38 diŠerent types of sands from diŠerent origins and with various grain sizes. For each type of sand, image analyses were performed toˆnd out the roundness, sphericity, regularity parameters belonging to individual grains. Additionally, several statistics of these parameters for diŠerent types of sands were determined. The results revealed that particle shape has a limited eŠect on the friction angle of sands in comparison to grain size distribution. Furthermore, it was found that decreasing regularity in particle shape caused an increase in the internal friction angle of uniform sands. Theseˆndings agree with the empirical relationship between the internal friction angle and particle shape suggested in the literature.

show abstract

Section: Shape Characterization and The Shear Strength Of Sandsmentioning

confidence: 99%

Relationships between Shape Characteristics and Shear Strength of Sands

Sezer

Altun

Göktepe³

2011

Soils and Foundations

View full text Add to dashboard Cite

show abstract

“…A list of the Fourier harmonic series within the complex signature waveform gave a dimensionless shape description of the particle. The central location of the vector can be, as in the work of Schwartz and Shane, the centre of the smallest circle inscribing the particle, or can be at the centre of gravity of the particle (Erlich & Weinberg 1970;Meloy 1977). The higher harmonics (>5) were believed to give an indication of the texture of the irregular particle.…”

Section: Fourier Transformation or Signature Waveforms Of Irregular Pmentioning

confidence: 99%

Particle Characterisation in Bulk Powders

Stanley-Wood¹

2005

Characterisation of Bulk Solids

View full text Add to dashboard Cite

“…The standard mathematical tool of Fourier series is a semi-analytical method that has received considerable attention. Fourier descriptors were initially introduced in Ehrlich and Weinberg (1970) and later applied to sand characterization (Meloy, 1977;Bowman et al, 2001;Garboczi, 2002;Mollon and Zhao, 2012, 2014.…”

Section: Introductionmentioning

confidence: 99%