Article
Engineering, Geological
Gang Wang, Zhaonan Wang, Qinguo Ye, Jingjing Zha
Summary: Particle breakage during triaxial compression tests on coral sands was studied to understand its influence on mechanical behaviors. A path-dependent model for particle breakage evolution was proposed and successfully reproduced the development of particle breakage, demonstrating its effectiveness for different stress paths.
JOURNAL OF ROCK MECHANICS AND GEOTECHNICAL ENGINEERING
(2021)
Article
Computer Science, Interdisciplinary Applications
Chuanfeng Fang, Jian Gong, Zhihong Nie, Bo Li, Xi Li
Summary: The study introduces a new approach that combines realistic particle shapes and breakage processes to investigate particle breakage in DEM. The experimental results demonstrate that particle breakage significantly affects the shear behavior at both macroscopic and microscopic levels.
COMPUTERS AND GEOTECHNICS
(2021)
Article
Engineering, Civil
Yuxing Nie, Jian Gong, Chuanfeng Fang, Zhibo Chen, Chuhan Huang
Summary: The effect of cyclic loading on the macro- and micromechanical behaviors of breakable granular materials was studied using the discrete element method (DEM). Breakable particle models with realistic shapes were created. Confined cyclic loading tests were performed at different amplitudes, and the deformation behaviors, particle breakage characteristics, and micromechanical results were investigated. It was found that particle breakage and cumulative plastic strain increase rapidly in the early loading stage and show an S-shaped increase in the stable state with increasing loading amplitude. This study highlights the importance of particle breakage in permanent deformation.
TRANSPORTATION GEOTECHNICS
(2023)
Article
Materials Science, Multidisciplinary
Shuang Jiao, Chengshun Xu, Jialin Xu, Chenglong Jiang
Summary: This paper reveals the impact of crushing on the macroscopic mechanical characteristics of granular materials from a microscopic perspective using the discrete element method (DEM). The complex and crucial influence of self-organized, mass conservation and volume conservation of daughter particles in the fragment replacement method (FRM) on particle breakage is investigated. The rationality of the volume expansion method and the influence of volume loss on various characteristics such as stress development, gradation change, and critical state are analyzed. The effects of inter-particle interaction on macroscopic properties are also studied.
JOURNAL OF MATERIALS SCIENCE
(2023)
Article
Engineering, Chemical
Zhihong Nie, Chuhan Huang, Pengpeng Zhao, Chuanfeng Fang
Summary: This study investigates the influence of the interparticle friction coefficient mu on the mechanical behavior of granular materials using the discrete element method. The results provide insights into the particle breakage characteristics and microscopic characteristics, and explain the underlying mechanisms of cpc evolution from the perspectives of particle movement and fabric anisotropy.
ADVANCED POWDER TECHNOLOGY
(2023)
Article
Engineering, Chemical
Zhedan Gong, Yang Yang, Lijie Cui, Jinlong He, Xiaoxing Liu
Summary: In this study, the size effect in the fragmentation strength of cylindrical alumina aggregate under quasi-static diametrical loading is investigated using Discrete Element Method (DEM) simulations. It is found that tensile stress concentration develops in the inner margin of the damage zone, leading to the emergence and propagation of diametrical crack and catastrophic splitting of the aggregate. Both the fragmentation strength and the dimensionless damage zone size decrease to limit values, and the latter is around 0.1. The DEM simulations suggest that the formation of damage zones adjacent to the loading points induces the size effect in the fragmentation of intact aggregate.
Article
Mathematics, Interdisciplinary Applications
Songling Han, Changming Wang, Xiaoyang Liu, Bailong Li, Ruiyuan Gao, Shuo Li
Summary: This article presents a novel method for generating particles with specific shape characteristics. By establishing estimation functions and proposing a stochastic algorithm, the shape parameters of the particles can be controlled successfully. The mechanical properties of the generated particles are also verified to be similar to realistic-shaped particles.
COMPUTATIONAL PARTICLE MECHANICS
(2023)
Article
Computer Science, Interdisciplinary Applications
Yang Li, Masahide Otsubo, Reiko Kuwano
Summary: This study used the discrete element method to simulate triaxial compression experiments with spherical particles. The study found that V-p is influenced by the major principal stress and the coordination number in the vertical direction, while V-s is more affected by the geometric mean stress and the mean coordination number. The wave velocity ratio V-p/V-s is linearly correlated with fabric anisotropy, allowing for prediction of microscopic fabric changes from macroscopic wave velocity values.
COMPUTERS AND GEOTECHNICS
(2021)
Review
Construction & Building Technology
Haohui Ding, Zheng Han, Yange Li, Wendou Xie, Bangjie Fu, Changli Li, Lianheng Zhao
Summary: Granular soils are extensively used in engineering and understanding the correlation between particle breakage and mechanical response is crucial. This study reviews the up-to-date research from four perspectives: statistical analysis, experimental investigation, numerical simulation, and theoretical analysis. Future research should focus on exploring the microstructure of particle systems to gain a deeper understanding of particle breakage.
CONSTRUCTION AND BUILDING MATERIALS
(2023)
Article
Physics, Fluids & Plasmas
Yupeng Jiang, Peter Mora, Hans J. Herrmann, Fernando Alonso-Marroquin
Summary: The damage separation model (DSM) is a realistic model for simulating particle fragmentation in granular assemblies. It overcomes limitations of previous methods by replacing fragmented particles with smaller ones, calculating strain energy field inside particles, and utilizing an advanced geometrical algorithm for postbreakage replacements. Validation through a uniaxial compression test and comparison with four different replaceable irregular particle methods demonstrate that DSM has great potential for capturing morphological changes of particle breakage with unprecedented numerical resolution, overcoming stability, accuracy, and artificial constraints issues.
Article
Engineering, Geological
Satoshi Matsumura, Shima Kawamura, Lalit Kandpal, Prashanth Vangla
Summary: The study investigates the feasibility of replicating porous and non-porous particles with the same particle shape characteristics using 3D printing technique. Single particle crushing and triaxial compression tests were conducted to characterize the mechanical properties of the 3D printed and porous volcanic soil particles. The results demonstrate that the response of the 3D printed particles varies based on particle porosity, and a qualitative similarity is observed in the response of the 3D printed porous particles with natural porous volcanic soil.
Article
Construction & Building Technology
Andre Fardin Rosa, Francisco Thiago Sacramento Aragao, Laura Maria Goretti da Motta
Summary: This paper analyzes the particle-size distribution of ballast materials from different sources and its influence on behavior under loads generated by trains. The study includes particle breakage analysis, cyclic triaxial tests, morphological analyses, and Discrete Element Method simulation. The results show significant differences in the adoption of different breakage indexes and highlight the importance of parameters such as the average number of contacts per particle for predicting ballast deterioration due to breakage.
CONSTRUCTION AND BUILDING MATERIALS
(2021)
Article
Engineering, Chemical
C. Hare, M. Ghadiri, Chuan-Yu Wu
Summary: The study compared two DEM-PBM approaches, one direct and one indirect, for predicting the size distribution of granules after dry compaction and milling. It was found that the direct approach showed reasonable agreement with experimental data, while accounting for material strength and loading conditions of fragments in the mill.
Article
Agricultural Engineering
Yuan Su, Yang Xu, Tao Cui, Xiaojun Gao, Guoyi Xia, Yibo Li, Mengmeng Qiao
Summary: The study investigates the relationship between BPM parameters and the macroscopic properties of maize kernels for better control of maize processing. Shear modulus and critical normal and shear stress have significant influences on rupture force and stiffness in maize kernels.
BIOSYSTEMS ENGINEERING
(2021)
Article
Computer Science, Interdisciplinary Applications
Yu Wang, Jia-Yan Nie, Shiwei Zhao, Hao Wang
Summary: A coupled finite element method (FEM) and discrete element method (DEM) modeling was developed to solve boundary value problems related to particle breakage. The effects of particle strength, particle shape, and confining pressure on particle breakage characteristics and further mechanical behaviors of quartz sands were investigated using this multiscale modeling approach. The results demonstrate that the coupled FEM-DEM modeling can successfully handle complex geomechanics problems involving particle breakage.
COMPUTERS AND GEOTECHNICS
(2023)
Article
Construction & Building Technology
Nura Shehu Aliyu Yaro, Muslich Hartadi Sutanto, Noor Zainab Habib, Madzlan Napiah, Aliyu Usman, Ashiru Muhammad
Summary: This study investigates the use of palm oil clinker waste to modify bitumen and improve its performance. The results show that the incorporation of palm oil clinker fine enhances the stiffness and temperature susceptibility of plain bitumen. Response surface methodology and artificial neural networks are used to optimize and predict the stiffness modulus and rutting characteristics of asphalt mixtures prepared with palm oil clinker fine modified bitumen. The experimental results confirm that all mixtures containing palm oil clinker fine modified bitumen exhibit better performance than the control mixture.
CONSTRUCTION AND BUILDING MATERIALS
(2022)
Article
Materials Science, Multidisciplinary
Chuanfeng Fang, Jian Gong, Mingtao Jia, Zhihong Nie, Bo Li, Ashiru Mohammed
Summary: This study investigated the effect of particle shape on the shear behavior of breakable granular materials using the DEM. The findings revealed the dependence of the macroscopic and microscopic shear behaviors on elongation and flatness, providing insights into the mechanical behavior of granular materials.
Article
Chemistry, Physical
Hao Liu, Yuxing Nie, Man Chen, Shunkai Liu, Ashiru Mohammed
Summary: Numerical measurement method for dynamic granular materials based on computer vision is proposed in this paper. By using an improved video instance segmentation network, the numerical information of granular materials can be accurately extracted. Experimental results show that this method is effective in measuring the numerical information of dynamic granular materials.
Article
Engineering, Chemical
Chuanfeng Fang, Zhihong Nie, Jian Gong, Bo Li, Wei Hu, Ashiru Mohammed
Summary: This study investigates the impact of multicontact loading on the crushing criterion, crushing pattern, and the relationship between particle crushing strength and loading distribution using the three-dimensional discrete element method. The results show a linear correlation between the logarithm of mean principal stress and coordination number, and the number and volume of child particles exhibit specific statistical distributions. Three models are proposed to qualitatively analyze the relationship between loading distribution and crushing strength.
Article
Engineering, Chemical
Yongxiang Wu, Nguyen Thi Hong Nhung, Deqian Zeng, Nengneng Luo, Akira Otsuki, Gjergj Dodbiba, Toyohisa Fujita
Summary: This study proposed a novel method for synthesizing flower-like vaterite calcium carbonate using nanobubble-containing ethanol and water mixed solution as the solvent and discussed the formation mechanism of vaterite with different shapes. The synthesized vaterite has significant practical interest in the integrated treatment of wastewater contaminated by heavy metals with effective Cd(II) removal, providing a promising field for studying heavy metal and pollutant adsorption in the liquid phase.
ADVANCED POWDER TECHNOLOGY
(2024)
Article
Engineering, Chemical
Jian Gong, Lipo Cheng, Ming Liu, Jie Jiang, Xiaoduo Ou
Summary: This study investigates the effects of particle shape on the collapse of granular columns using the discrete element method. The results show that particle shape has a significant impact on deposition morphology, energy evolution, and mechanical coordination number. Sphericity and angularity are identified as the most important macroscale factors, while roughness has a weaker microscale influence.
ADVANCED POWDER TECHNOLOGY
(2024)
