{"title":"Specific features of strain in granular materials","authors":"F. Dedecker, M. Chaze, P. 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":"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.","PeriodicalId":100899,"journal":{"name":"Mechanics of Cohesive-frictional Materials","volume":null,"pages":null},"PeriodicalIF":0.0000,"publicationDate":"2000-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"51","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Mechanics of Cohesive-frictional Materials","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.1002/(SICI)1099-1484(200004)5:3<173::AID-CFM90>3.0.CO;2-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
粒状材料应变的特殊特征
本文分析了局部运动学与宏观尺度上定义的应变张量之间的联系。第一部分的目的是分析在数值模拟中使用DEM获得的局部运动学变量。第二部分着重分析了从局部变量定义应变张量的两种不同方法。第一种方法只考虑接触处的相对位移,这是众所周知的。结果表明,这种方法通常是无效的。第二种方法是基于Delaunay三角剖分法。然后提出了局部应变的分解,并允许展示局部运动学(邻近颗粒接触和位移时的运动学)的不同机制的影响。版权所有©2000约翰威利父子有限公司
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