{"title":"Specific features of strain in granular materials","authors":"F. Dedecker, M. Chaze, Ph. Dubujet, B. Cambou","doi":"10.1002/(SICI)1099-1484(200004)5:3<173::AID-CFM90>3.0.CO;2-Z","DOIUrl":null,"url":null,"abstract":"<p>This paper analyses the link between local kinematics and strain tensor defined at a macroscale. The aim of the first part is to analyse the local kinematics variables obtained in a numerical simulation using the DEM. The second part is focused on the analysis of two different approaches to define the strain tensor from local variables. The first approach which only considers relative displacements at the contacts is well known. It is shown that this approach is not usually valid. The second approach is based on the Delaunay triangulation. A decomposition of the local strain is then proposed and it allows the influence of the different mechanisms of the local kinematics (kinematics at contact and displacement of neighbouring particles) to be demonstrated. Copyright © 2000 John Wiley & Sons, Ltd.</p>","PeriodicalId":100899,"journal":{"name":"Mechanics of Cohesive-frictional Materials","volume":null,"pages":null},"PeriodicalIF":0.0000,"publicationDate":"2000-04-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1002/(SICI)1099-1484(200004)5:3<173::AID-CFM90>3.0.CO;2-Z","citationCount":"51","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Mechanics of Cohesive-frictional Materials","FirstCategoryId":"1085","ListUrlMain":"https://onlinelibrary.wiley.com/doi/10.1002/%28SICI%291099-1484%28200004%295%3A3%3C173%3A%3AAID-CFM90%3E3.0.CO%3B2-Z","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
引用次数: 51
Abstract
This paper analyses the link between local kinematics and strain tensor defined at a macroscale. The aim of the first part is to analyse the local kinematics variables obtained in a numerical simulation using the DEM. The second part is focused on the analysis of two different approaches to define the strain tensor from local variables. The first approach which only considers relative displacements at the contacts is well known. It is shown that this approach is not usually valid. The second approach is based on the Delaunay triangulation. A decomposition of the local strain is then proposed and it allows the influence of the different mechanisms of the local kinematics (kinematics at contact and displacement of neighbouring particles) to be demonstrated. Copyright © 2000 John Wiley & Sons, Ltd.
颗粒材料中应变的具体特征
本文分析了在宏观尺度上定义的局部运动学和应变张量之间的联系。第一部分的目的是分析在使用DEM的数值模拟中获得的局部运动学变量。第二部分重点分析了从局部变量定义应变张量的两种不同方法。仅考虑接触处的相对位移的第一种方法是众所周知的。结果表明,这种方法通常是无效的。第二种方法是基于Delaunay三角测量。然后提出了局部应变的分解,它允许证明局部运动学的不同机制(相邻粒子接触和位移时的运动学)的影响。版权所有©2000 John Wiley&;有限公司。
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