Influence of particle shape on the internal structure and particle movement in sand creep

Gao Yan; Chen Qing; Bai Wenfeng; Sun Le; Jiang Yuchao; Tang Xudong

doi:10.11714/acta.snus.ZR20250223

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Influence of particle shape on the internal structure and particle movement in sand creep

Research articles | 更新时间：2026-07-24

- Influence of particle shape on the internal structure and particle movement in sand creep
- Acta Scientiarum Naturalium Universitatis Sunyatseni Vol. 65, Issue 4, Pages: 113-122(2026)
- 作者机构：
  
  1.中山大学地球科学与工程学院，广东珠海 519082
  2.广州地铁设计研究院股份有限公司，广东广州 510010
- 作者简介：
- 基金信息：
- DOI：10.11714/acta.snus.ZR20250223
  CLC： P64
- Received：17 October 2025，
  
  Revised：2025-12-01，
  
  Accepted：05 January 2026，
  
  Online First：03 April 2026，
  
  Published：25 July 2026
- 稿件说明：
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高燕,陈庆,柏文锋等.颗粒形状对砂土蠕变的内部结构与颗粒运动的影响[J].中山大学学报(自然科学版)(中英文),2026,65(04):113-122.

Gao Yan,Chen Qing,Bai Wenfeng,et al.Influence of particle shape on the internal structure and particle movement in sand creep[J].Acta Scientiarum Naturalium Universitatis Sunyatseni,2026,65(04):113-122.
高燕,陈庆,柏文锋等.颗粒形状对砂土蠕变的内部结构与颗粒运动的影响[J].中山大学学报(自然科学版)(中英文),2026,65(04):113-122. DOI： 10.11714/acta.snus.ZR20250223.

Gao Yan,Chen Qing,Bai Wenfeng,et al.Influence of particle shape on the internal structure and particle movement in sand creep[J].Acta Scientiarum Naturalium Universitatis Sunyatseni,2026,65(04):113-122. DOI： 10.11714/acta.snus.ZR20250223.

摘要

砂土的颗粒形状会影响其物理力学性质，从而影响其工程特性。为探究蠕变过程中砂土颗粒形状对其内部结构与颗粒运动特征的影响，建立微观颗粒运动与宏观变形的联系，本研究基于离散元数值模拟方法，模拟不同颗粒形状的砂土在不同应力下的蠕变过程。研究表明，非圆形颗粒与圆形颗粒对蠕变的微观响应有较大差异。颗粒形状越扁平，砂土强度越高，蠕变变形越趋向于体积减小。蠕变过程中，不同的颗粒形状会影响颗粒间接触力分布，使其与砂土剪切过程中颗粒间接触力的分布规律更为相似；在颗粒排列方向上，越扁平的颗粒越趋于朝着垂直于主应力方向（水平方向）分布。剪切过程中，颗粒形状使得颗粒间接触运动对整体试样的变形贡献发生改变，非圆形颗粒的法向接触滑移引起剪胀，而切向接触滑移引起剪缩，与圆形颗粒运动的贡献相反。蠕变过程中，颗粒间接触运动对宏观体应变的贡献与蠕变起始点的应变特征密切相关，即颗粒间接触运动的贡献取决于蠕变的初始状态，是初始状态的变形延续。本研究可为地基的长期稳定性与变形预测提供一定的理论基础。

Abstract

The shape of sand particles affects the physical and mechanical properties of sand， thereby influencing its engineering behavior. To investigate the influence of soil particle shape on its internal structure and particle motion characteristics， the creep process of sands with different particle shapes under varying stresses was simulated based on the discrete element method in the study. The results reveal that the micro-scopic of non-spherical particles to creep is quite different from that of spherical particles. The flatter particle shape leads to higher sample strength and more volumetric contraction. The particle shape affects the distribution of contact force during creep， which makes it more comparable to the distribution of contact force in the shearing process. In terms of particle alignment， the flatter the particles， the more they tend to be distributed in the direction perpendicular to the major external loading （i.e.， the horizontal direction） during creep. During shearing， particle shape changes the contribution of internal particle contact motion to overall specimen deformation normal contact deformation produces dilatancy while tangential contact deformation generates contraction， contrary to its contribution in spherical particle motion. The contribution of inter-particle contact motion to the volumetric strain during creep is closely related to the strain characteristics at the onset of creep. In other words， the contribution of the interparticle contact motion in creep depends on the initial state of creep and is a continuation of the deformation from that state. This study provides a theoretical basis for predicting long-term stability and deformation in geotechnical foundations.

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references

黄良，曹杰，邓清禄，等， 2025 . 颗粒形状对砂土剪切特性影响的试验和数值分析［J］. 安全与环境工程， 32 （ 3 ）： 90 - 100 .

康馨，陈植欣，雷航，等， 2020 . 基于3D打印研究颗粒形状对砂土宏观力学性质的影响［J］. 岩土工程学报， 42 （ 9 ）： 1765 - 1772 .

刘鑫，徐新钰，黄良，等， 2024 . 考虑颗粒形状影响的砂土剪切波速研究［J］. 岩石力学与工程学报， 43 （ 5 ）： 1291 - 1300 .

罗岚，夏唐代，仇浩淼， 2018 . K 0 条件下颗粒形状特征对砂土剪切模量的影响［J］. 岩土力学， 39 （ 10 ）： 3695 - 3702 .

王蕴嘉，宋二祥， 2019 . 堆石料颗粒形状对堆积密度及强度影响的离散元分析［J］. 岩土力学， 40 （ 6 ）： 2416 - 2426 .

王志兵，宁泽华，王晨，等， 2024 . 基于CT扫描研究颗粒形状对砂土力学性质的影响［J］. 科学技术与工程， 24 （ 21 ）： 9077 - 9086 .

吴杨，容浩俊，王金莲，等， 2023 . 颗粒形状和中主应力对砂土力学特性耦合影响的真三轴试验研究［J］. 岩石力学与工程学报， 42 （ 2 ）： 497 - 507 .

张宇，王晅，张家生，等， 2022 . 颗粒形状对砂土力学特性的影响研究［J］. 铁道科学与工程学报， 19 （ 11 ）： 3256 - 3265 .

Chen Q ， Gao Y ， Yuan Q ， et al ， 2022 . The correlation of macro deformation and micro kinematics for dense granular material subjected to shearing ［J］. Comput Geotech ， 141 ： 104523 .

Gao Y ， Chen Q ， Yuan Q ， et al ， 2023 . The kinematics and micro mechanism of creep in sand based on DEM simulations ［J］. Comput Geotech ， 153 ： 105082 .

Goryacheva I G ， Zobova A A ， 2022 . Dynamics of deformable contacting bodies with sliding， rolling， and spinning ［J］. Int J Mech Sci ， 216 ： 106981 .

Kang D H ， Yun T S ， Lau Y M ， et al ， 2012 . DEM simulation on soil creep and associated evolution of pore characteristics ［J］. Comput Geotech ， 39 ： 98 - 106 .

Kildashti K ， Dong K ， Yu A ， 2023 . Contact force models for non-spherical particles with different surface properties： A review ［J］. Powder Technol ， 418 ： 118323 .

Li X ， Li X S ， 2009 . Micro-macro quantification of the internal structure of granular materials ［J］. J Eng Mech ， 135 （ 7 ）： 641 - 656 .

Necochea J E ， SáEz E ， Hanley K J ， 2024 . Effect of sand particle shape on micromechanical modeling in direct shear testing ［J］. Comput Geotech ， 169 ： 106222 .

Rothenburg L ， Bathurst R J ， 1991 . Numerical simulation of idealized granular assemblies with plane elliptical particles ［J］. Comput Geotech ， 11 （ 4 ）： 315 - 329 .

Wang Y ， Song E ， Zhao Z ， 2018 . Particle mechanics modeling of the effect of aggregate shape on creep of durable rockfills ［J］. Comput Geotech ， 98 ： 114 - 131 .

Wu Y ， Cui J ， Huang J ， et al ， 2021 . Correlation of critical state strength properties with particle shape and surface fractal dimension of clinker ash ［J］. Int J Geomech ， 21 （ 6 ）： 04021071 .

Xiao M ， Ding Y ， 2021 . Contact kinematics between three-dimensional rigid bodies with general surface parameterization ［J］. J Mech Robot ， 3 （ 2 ）： 021006 .

Yang S ， Huang D ， 2023 . Understanding fabric evolution and multiple liquefaction resistance of sands in the presence of initial static shear stress ［J］. Soil Dyn Earthq Eng ， 171 ： 107962 .

Yang S ， Huang D ， Wang G ， et al ， 2022 . Probing fabric evolution and reliquefaction resistance of sands using discrete-element modeling ［J］. J Eng Mech ， 148 （ 6 ）： 04022023 .

Yuan Q ， 2016 . Experimental characterizations of structural kinematics at micro- and meso-scales in a 2D rod assembly subjected to shearing ［D］. Hong Kong ： The Hong Kong University of Science and Technology .

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