粘性颗粒和团聚体的离散元素接触模型和参数校准

IF 2.4 3区 工程技术 Q3 ENGINEERING, ENVIRONMENTAL Journal of Terramechanics Pub Date : 2024-06-29 DOI:10.1016/j.jterra.2024.100998
Zhifan Chen, Angxu Duan, Yang Liu, Hanqi Zhao, Chunyang Dai, Seng Hu, Xiaolong Lei, Jianfeng Hu, Lin Chen
{"title":"粘性颗粒和团聚体的离散元素接触模型和参数校准","authors":"Zhifan Chen,&nbsp;Angxu Duan,&nbsp;Yang Liu,&nbsp;Hanqi Zhao,&nbsp;Chunyang Dai,&nbsp;Seng Hu,&nbsp;Xiaolong Lei,&nbsp;Jianfeng Hu,&nbsp;Lin Chen","doi":"10.1016/j.jterra.2024.100998","DOIUrl":null,"url":null,"abstract":"<div><p>The soil in southwest China is a cohesive soil in which discrete cohesive particles and aggregates coexist. In view of the problem that there are many studies on discrete cohesive particles and a lack of research on aggregates, discrete element software DEM is used to conduct a study on cohesive particles and agglomerates parameter calibration. The angle of repose is selected as the target value to calibrate the simulation parameters of sticky particles. Then, the simulation parameters of the viscous particles are used as the basis for the calibration of the contact parameters of the agglomerates, and shear experiments are conducted on the agglomerates, with the ultimate shear depth and ultimate shear force as target values. The results show that the parameters of the agglomerate are: Normal Stiffness per unit area is 5.627 × 10<sup>8</sup> N/m<sup>3</sup>, Shear Stiffness per unit area is 4.359 × 10<sup>8</sup> N/m<sup>3</sup>, Critical Normal Stress is 3.5 × 10<sup>6</sup> Pa, Critical Shear Stress is 4.5 × 10<sup>6</sup> Pa and Bonded Disk Radius is 5.43 mm. Through the particle sliding friction angle test and the agglomerate compression test, it was verified that the errors of sticky particles were 0.30 % and 0.37 % respectively, and the error of agglomerates was 1.69 %.</p></div>","PeriodicalId":50023,"journal":{"name":"Journal of Terramechanics","volume":null,"pages":null},"PeriodicalIF":2.4000,"publicationDate":"2024-06-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S0022489824000405/pdfft?md5=a687c65faf0abd40ea368ca45146d2a1&pid=1-s2.0-S0022489824000405-main.pdf","citationCount":"0","resultStr":"{\"title\":\"Discrete element contact model and parameter calibration of sticky particles and agglomerates\",\"authors\":\"Zhifan Chen,&nbsp;Angxu Duan,&nbsp;Yang Liu,&nbsp;Hanqi Zhao,&nbsp;Chunyang Dai,&nbsp;Seng Hu,&nbsp;Xiaolong Lei,&nbsp;Jianfeng Hu,&nbsp;Lin Chen\",\"doi\":\"10.1016/j.jterra.2024.100998\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><p>The soil in southwest China is a cohesive soil in which discrete cohesive particles and aggregates coexist. In view of the problem that there are many studies on discrete cohesive particles and a lack of research on aggregates, discrete element software DEM is used to conduct a study on cohesive particles and agglomerates parameter calibration. The angle of repose is selected as the target value to calibrate the simulation parameters of sticky particles. Then, the simulation parameters of the viscous particles are used as the basis for the calibration of the contact parameters of the agglomerates, and shear experiments are conducted on the agglomerates, with the ultimate shear depth and ultimate shear force as target values. The results show that the parameters of the agglomerate are: Normal Stiffness per unit area is 5.627 × 10<sup>8</sup> N/m<sup>3</sup>, Shear Stiffness per unit area is 4.359 × 10<sup>8</sup> N/m<sup>3</sup>, Critical Normal Stress is 3.5 × 10<sup>6</sup> Pa, Critical Shear Stress is 4.5 × 10<sup>6</sup> Pa and Bonded Disk Radius is 5.43 mm. Through the particle sliding friction angle test and the agglomerate compression test, it was verified that the errors of sticky particles were 0.30 % and 0.37 % respectively, and the error of agglomerates was 1.69 %.</p></div>\",\"PeriodicalId\":50023,\"journal\":{\"name\":\"Journal of Terramechanics\",\"volume\":null,\"pages\":null},\"PeriodicalIF\":2.4000,\"publicationDate\":\"2024-06-29\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"https://www.sciencedirect.com/science/article/pii/S0022489824000405/pdfft?md5=a687c65faf0abd40ea368ca45146d2a1&pid=1-s2.0-S0022489824000405-main.pdf\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Journal of Terramechanics\",\"FirstCategoryId\":\"5\",\"ListUrlMain\":\"https://www.sciencedirect.com/science/article/pii/S0022489824000405\",\"RegionNum\":3,\"RegionCategory\":\"工程技术\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q3\",\"JCRName\":\"ENGINEERING, ENVIRONMENTAL\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Journal of Terramechanics","FirstCategoryId":"5","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S0022489824000405","RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q3","JCRName":"ENGINEERING, ENVIRONMENTAL","Score":null,"Total":0}
引用次数: 0

摘要

中国西南地区的土壤属于离散粘粒与团聚体共存的粘性土壤。针对离散粘性颗粒研究较多而团聚体研究较少的问题,采用离散元软件 DEM 对粘性颗粒和团聚体进行参数标定研究。选择休止角为目标值来校准粘性颗粒的模拟参数。然后,以粘性颗粒的模拟参数为基础校准团聚体的接触参数,并以极限剪切深度和极限剪切力为目标值对团聚体进行剪切实验。结果表明,团聚体的参数为单位面积法向刚度为 5.627 × 108 N/m3,单位面积剪切刚度为 4.359 × 108 N/m3,临界法向应力为 3.5 × 106 Pa,临界剪切应力为 4.5 × 106 Pa,粘结盘半径为 5.43 mm。通过颗粒滑动摩擦角试验和团聚体压缩试验,验证了粘性颗粒的误差分别为 0.30 % 和 0.37 %,团聚体的误差为 1.69 %。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

摘要图片

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
Discrete element contact model and parameter calibration of sticky particles and agglomerates

The soil in southwest China is a cohesive soil in which discrete cohesive particles and aggregates coexist. In view of the problem that there are many studies on discrete cohesive particles and a lack of research on aggregates, discrete element software DEM is used to conduct a study on cohesive particles and agglomerates parameter calibration. The angle of repose is selected as the target value to calibrate the simulation parameters of sticky particles. Then, the simulation parameters of the viscous particles are used as the basis for the calibration of the contact parameters of the agglomerates, and shear experiments are conducted on the agglomerates, with the ultimate shear depth and ultimate shear force as target values. The results show that the parameters of the agglomerate are: Normal Stiffness per unit area is 5.627 × 108 N/m3, Shear Stiffness per unit area is 4.359 × 108 N/m3, Critical Normal Stress is 3.5 × 106 Pa, Critical Shear Stress is 4.5 × 106 Pa and Bonded Disk Radius is 5.43 mm. Through the particle sliding friction angle test and the agglomerate compression test, it was verified that the errors of sticky particles were 0.30 % and 0.37 % respectively, and the error of agglomerates was 1.69 %.

求助全文
通过发布文献求助,成功后即可免费获取论文全文。 去求助
来源期刊
Journal of Terramechanics
Journal of Terramechanics 工程技术-工程:环境
CiteScore
5.90
自引率
8.30%
发文量
33
审稿时长
15.3 weeks
期刊介绍: The Journal of Terramechanics is primarily devoted to scientific articles concerned with research, design, and equipment utilization in the field of terramechanics. The Journal of Terramechanics is the leading international journal serving the multidisciplinary global off-road vehicle and soil working machinery industries, and related user community, governmental agencies and universities. The Journal of Terramechanics provides a forum for those involved in research, development, design, innovation, testing, application and utilization of off-road vehicles and soil working machinery, and their sub-systems and components. The Journal presents a cross-section of technical papers, reviews, comments and discussions, and serves as a medium for recording recent progress in the field.
期刊最新文献
Modelling and simulation fundamentals in design for ground vehicle mobility Part II: Western approach Numerical analysis of tire mobility on deformable plastic clay in saturated conditions using total and effective stress frameworks Analysis of tire characteristics driving on asphalt paved roads covered with volcanic ash Modelling and simulation fundamentals in design for ground vehicle mobility part I: Eastern approach Towards more efficient tractors: Assessing and refining traction test procedures for agricultural tractors
×
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