A digitalized 2D particle database for statistical shape analysis and discrete modeling of rock aggregate

Author(s)
D. Huang, L. Zhao, S. Zhang, X. Wang
Publisher
Elsevier
Source
Construction and Building Materials
Keywords
Angle of repose, Biaxial shear test, Discrete element method, Rock aggregate, Shape index database, Statistical analysis
Year
2020

Obtaining geometric information of rock aggregates is a requisite process for numerical simulation and experimental investigation of their macroscopic and microscopic properties. In this study, a systematic framework is first established to create a digitalized 2D particle database for the shape evaluation and discrete modeling of rock aggregates. Then, the shape indexes of 2D rock aggregates are computed and statistically analyzed. Subsequently, a series of computational geometry algorithms are employed to generate numerical samples. Finally, numerical simulations are carried out to quantitatively investigate the effects of the aspect ratio on the macro- and micro-mechanical properties of 2D rock aggregates based on PFC2D.

Keywords: Rock aggregate, Shape index database, Statistical analysis, Discrete element method, Angle of repose, Biaxial shear test

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