The combined effect of particle angularity and inter-particle friction on micro- and macroscopic properties of granular assemblies

IF 5.3 1区 工程技术 Q1 COMPUTER SCIENCE, INTERDISCIPLINARY APPLICATIONS Computers and Geotechnics Pub Date : 2024-10-31 DOI:10.1016/j.compgeo.2024.106850
Dominik Krengel , Haoran Jiang , Jian Chen , Takashi Matsushima
{"title":"The combined effect of particle angularity and inter-particle friction on micro- and macroscopic properties of granular assemblies","authors":"Dominik Krengel ,&nbsp;Haoran Jiang ,&nbsp;Jian Chen ,&nbsp;Takashi Matsushima","doi":"10.1016/j.compgeo.2024.106850","DOIUrl":null,"url":null,"abstract":"<div><div>Both inter-particle friction and particle shape are known to influence the micro- and macroscopic properties of granular assemblies individually. However their combined influence is still poorly understood. In this work we perform a series of Discrete Element Simulations to systematically study the combined effect of particle angularity and friction on the shear resistance of granular aggregates. We find that for angular particles the residual shear resistance as a function of inter-particle friction shows a local maximum, while for round particles it increases monotonically until it saturates. In contrast, no such effect is observed in the packing structure of the aggregates. The non-monotonic behaviour of angular particles is mirrored by the critical state directional and normal force fabric anisotropies, while the tangential normal force anisotropy shows more similarity to the bulk porosity and the mobilization of friction at the individual particle contacts. Our results now provide a much clearer picture on the origin of the non-monotonic behaviour of the critical state shear resistance on the inter-particle friction, as a competition between sliding and rolling in two different rolling regimes.</div></div>","PeriodicalId":55217,"journal":{"name":"Computers and Geotechnics","volume":"177 ","pages":"Article 106850"},"PeriodicalIF":5.3000,"publicationDate":"2024-10-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Computers and Geotechnics","FirstCategoryId":"5","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S0266352X24007894","RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"COMPUTER SCIENCE, INTERDISCIPLINARY APPLICATIONS","Score":null,"Total":0}
引用次数: 0

Abstract

Both inter-particle friction and particle shape are known to influence the micro- and macroscopic properties of granular assemblies individually. However their combined influence is still poorly understood. In this work we perform a series of Discrete Element Simulations to systematically study the combined effect of particle angularity and friction on the shear resistance of granular aggregates. We find that for angular particles the residual shear resistance as a function of inter-particle friction shows a local maximum, while for round particles it increases monotonically until it saturates. In contrast, no such effect is observed in the packing structure of the aggregates. The non-monotonic behaviour of angular particles is mirrored by the critical state directional and normal force fabric anisotropies, while the tangential normal force anisotropy shows more similarity to the bulk porosity and the mobilization of friction at the individual particle contacts. Our results now provide a much clearer picture on the origin of the non-monotonic behaviour of the critical state shear resistance on the inter-particle friction, as a competition between sliding and rolling in two different rolling regimes.
查看原文
分享 分享
微信好友 朋友圈 QQ好友 复制链接
本刊更多论文
颗粒角度和颗粒间摩擦对颗粒集合体微观和宏观特性的综合影响
众所周知,颗粒间摩擦和颗粒形状都会单独影响颗粒集合体的微观和宏观特性。然而,人们对它们的综合影响还知之甚少。在这项工作中,我们进行了一系列离散元素模拟,系统地研究了颗粒角度和摩擦力对颗粒集合体抗剪性能的综合影响。我们发现,对于棱角分明的颗粒,残余剪切阻力与颗粒间摩擦力的函数关系显示出局部最大值,而对于圆形颗粒,残余剪切阻力单调增加直至饱和。相反,在聚合体的堆积结构中没有观察到这种效应。角形颗粒的非单调行为反映在临界状态的方向力和法向力结构各向异性上,而切向法向力各向异性则显示出与块体孔隙率和单个颗粒接触处的摩擦动员更为相似。现在,我们的结果更清楚地说明了临界状态剪切阻力对颗粒间摩擦力的非单调行为的起源,即滑动和滚动在两种不同滚动状态下的竞争。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
求助全文
约1分钟内获得全文 去求助
来源期刊
Computers and Geotechnics
Computers and Geotechnics 地学-地球科学综合
CiteScore
9.10
自引率
15.10%
发文量
438
审稿时长
45 days
期刊介绍: The use of computers is firmly established in geotechnical engineering and continues to grow rapidly in both engineering practice and academe. The development of advanced numerical techniques and constitutive modeling, in conjunction with rapid developments in computer hardware, enables problems to be tackled that were unthinkable even a few years ago. Computers and Geotechnics provides an up-to-date reference for engineers and researchers engaged in computer aided analysis and research in geotechnical engineering. The journal is intended for an expeditious dissemination of advanced computer applications across a broad range of geotechnical topics. Contributions on advances in numerical algorithms, computer implementation of new constitutive models and probabilistic methods are especially encouraged.
期刊最新文献
Stability of conical foundations on anisotropic clay: A comprehensive three-dimensional study on V-H-M failure envelopes Effect of the connection mode on the dynamic characteristics of the pile-wheel composite foundation for offshore wind turbines Particle shape distribution effects on the critical strength of granular materials DEM Validation for impact Wave propagation in dry sand: A comparison with experimental results Evaluation of the shear stiffness and load redistribution of framed structures affected by tunnelling
×
引用
GB/T 7714-2015
复制
MLA
复制
APA
复制
导出至
BibTeX EndNote RefMan NoteFirst NoteExpress
×
×
提示
您的信息不完整,为了账户安全,请先补充。
现在去补充
×
提示
您因"违规操作"
具体请查看互助需知
我知道了
×
提示
现在去查看 取消
×
提示
确定
0
微信
客服QQ
Book学术公众号 扫码关注我们
反馈
×
意见反馈
请填写您的意见或建议
请填写您的手机或邮箱
已复制链接
已复制链接
快去分享给好友吧!
我知道了
×
扫码分享
扫码分享
Book学术官方微信
Book学术文献互助
Book学术文献互助群
群 号:481959085
Book学术
文献互助 智能选刊 最新文献 互助须知 联系我们:info@booksci.cn
Book学术提供免费学术资源搜索服务,方便国内外学者检索中英文文献。致力于提供最便捷和优质的服务体验。
Copyright © 2023 Book学术 All rights reserved.
ghs 京公网安备 11010802042870号 京ICP备2023020795号-1