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Internal rolling method for particle shape evaluation and reconstruction.

¹State Key Laboratory for GeoMechanics and Deep Underground Engineering, School of Mechanics and Civil Engineering, China University of Mining and Technology, Xuzhou, Jiangsu, China.

|November 12, 2020

Summary

This summary is machine-generated.

This study introduces a new method for analyzing 2D particle shapes using internal rolling discs. It provides robust indices for sphericity, roundness, and roughness, enabling accurate shape characterization and reconstruction.

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Area of Science:

Geosciences
Materials Science
Image Analysis

Background:

Accurate particle shape evaluation is crucial for understanding material properties.
Existing methods may lack robustness or fail to capture multiscale features.
Geometric-based evaluations offer dimensionless and precise characterization.

Purpose of the Study:

To develop a concise and robust method for 2D particle shape evaluation and reconstruction.
To introduce new indices for sphericity, roundness, and roughness.
To enable statistical representation and reconstruction of particle shapes.

Main Methods:

Utilizing the concept of internal rolling of covering discs within particle outlines.
Downscaling disc size to capture multiscale features and calculating Euclidean distance.
Developing a sphericity-roundness diagram and probabilistic density surface for analysis.

Main Results:

Three dimensionless indices (sphericity, roundness, roughness) were derived.
The method demonstrated precise distinguishability between shapes after validation.
Particle shape reconstruction was achieved, replicating key indices and characteristic curves.

Conclusions:

The proposed method offers a robust approach for 2D particle shape evaluation and reconstruction.
It facilitates statistical analysis and numerical investigations of particle shape effects.
The method is extendable to 3D measurements using rolling covering spheres.