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Investigation of the effect of particle size non-uniformity on the stress-force-fabric relationship for granular materials

文献类型：期刊论文

作者Gong, Jian2,3; Wang, Fei3; Deng, Liangbin3; Nie, Jiayan1; Xu, Hai3; Zheng, Yi3; Jiang, Jie3; Ou, Xiaoduo3; Pang, Xianwei3
刊名COMPUTERS AND GEOTECHNICS
出版日期2025-04-01
卷号180页码:19
关键词Stress-force-fabric relationship Granular materials Non-uniformity Discrete element method Computational geomechanics
ISSN号0266-352X
DOI10.1016/j.compgeo.2024.107052
英文摘要The traditional stress-force-fabric relationship (SFF relationship) assumes that contact forces and branch vectors are independent, linking between the macro- and micro-scale behaviors of granular materials. However, both experimental results and numerical simulations indicate that this assumption does not hold for granular materials with high particle size non-uniformity. This study investigates the effect of non-uniformity on the SFF relationship for granular materials via 3D discrete element method (DEM). A series of drained triaxial tests was conducted on dense granular materials with continuous and gap gradations, varying the non-uniformity coefficient (Cu). The results show that as Cuincrease, the stress ratios predicted by the traditional SFF relationship gradually deviate from that DEM data. This deviation is attributed to the correlation between contact forces and branch vectors, which can be characterized using a lower-order Fourier series expansion. Based on the traditional SFF relationship and incorporating this correlation, a modified SFF relationship is proposed. Verifications show that stress ratios from the modified SFF relationship align well with the DEM data. Finally, an anisotropic analysis provides insights into the microscopic mechanisms underlying the dependence of shear strength on Cu.
资助项目National Natural Science Foundation of China[52368045] ; National Natural Science Foundation of China[51809292] ; Open Research Fund of State Key Laboratory of Geomechanics and Geotechnical Engineering, Institute of Rock and Soil Mechanics, Chinese Academy of Sciences[SKLGME021007] ; China Postdoctoral Science Foundation[2022MD723786] ; Guangxi Natural Science Foundation[2024JJA160220] ; Guangxi Natural Science Foundation[2021AC19244] ; Major Project of Guangxi Science and Technology[AA23023016] ; Innovation Project of Guangxi Graduate Education[YCSW2023088]
WOS研究方向Computer Science ; Engineering ; Geology
语种英语
WOS记录号WOS:001399718100001
出版者ELSEVIER SCI LTD
源URL[http://119.78.100.198/handle/2S6PX9GI/37193]  
专题中科院武汉岩土力学所
通讯作者Ou, Xiaoduo
作者单位1.Wuhan Univ, Sch Civil Engn, Wuhan, Peoples R China
2.Chinese Acad Sci, Inst Rock & Soil Mech, State Key Lab Geomech & Geotech Engn, Wuhan, Peoples R China
3.Guangxi Univ, Sch Civil Engn & Architecture, Nanning, Guangxi, Peoples R China
推荐引用方式
GB/T 7714		 Gong, Jian,Wang, Fei,Deng, Liangbin,et al. Investigation of the effect of particle size non-uniformity on the stress-force-fabric relationship for granular materials[J]. COMPUTERS AND GEOTECHNICS,2025,180:19.
APA Gong, Jian.,Wang, Fei.,Deng, Liangbin.,Nie, Jiayan.,Xu, Hai.,...&Pang, Xianwei.(2025).Investigation of the effect of particle size non-uniformity on the stress-force-fabric relationship for granular materials.COMPUTERS AND GEOTECHNICS,180,19.
MLA Gong, Jian,et al."Investigation of the effect of particle size non-uniformity on the stress-force-fabric relationship for granular materials".COMPUTERS AND GEOTECHNICS 180(2025):19.

入库方式： OAI收割

来源：武汉岩土力学研究所

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