A rockfill particle breakage evolution model for predicting gradation changes

Junwen Zhu; Jinbao Sheng; Linnan Ding

doi:10.1117/12.2692038

23 August 2023 A rockfill particle breakage evolution model for predicting gradation changes

Junwen Zhu, Jinbao Sheng, Linnan Ding

Proceedings Volume 12784, Second International Conference on Applied Statistics, Computational Mathematics, and Software Engineering (ASCMSE 2023); 127842F (2023) https://doi.org/10.1117/12.2692038
Event: 2023 2nd International Conference on Applied Statistics, Computational Mathematics and Software Engineering (ASCMSE 2023), 2023, Kaifeng, China

Abstract

Particle crushing will affect the strength and deformation characteristics of rockfill materials. At present, the particle crushing and corresponding gradation change laws of rockfill materials under different mechanical states are not clear. In this paper, the fractal gradation equation is combined with the existing particle crushing results of rockfill under triaxial shearing, and a more convenient equation system model is constructed, which can realize the transformation of "stress-strain-breaking index-gradation distribution". The fractal gradation equation was used to fit the gradation of four different rockfill materials, and it was found that the fitting effect was good. Combined with the particle breakage index and the fractal gradation equation proposed by Einav, the fractal dimension D can be derived from the particle breakage rate B_E through equation transformation, that is, the breakage index is converted into a gradation distribution. Based on the existing particle crushing test data, a model that can predict the crushing index under different mechanical conditions is proposed. The model reflects the evolution relationship of the crushing index with the shear strain and average normal stress. Fitting was performed to verify the accuracy of the model, and the conversion between stress-strain and crushing indexes was realized. Combining the two transformation models, the evolution model of the gradation distribution law under different mechanical conditions can be obtained.

Citation Download Citation

Junwen Zhu, Jinbao Sheng, and Linnan Ding "A rockfill particle breakage evolution model for predicting gradation changes", Proc. SPIE 12784, Second International Conference on Applied Statistics, Computational Mathematics, and Software Engineering (ASCMSE 2023), 127842F (23 August 2023); https://doi.org/10.1117/12.2692038

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KEYWORDS

Particles

Fractal analysis

Data modeling

Deformation

Correlation coefficients

Design and modelling

Reflection

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