Specific features of strain in granular materials

✍ Scribed by F. Dedecker; M. Chaze; Ph. Dubujet; B. Cambou

• Publisher: John Wiley and Sons
• Year: 2000
• Tongue: English
• Weight: 535 KB
• Volume: 5
• Category: Article
• ISSN: 1082-5010
• DOI: 10.1002/(sici)1099-1484(200004)5:3<173::aid-cfm90>3.0.co;2-z

✦ Synopsis

This paper analyses the link between local kinematics and strain tensor de"ned at a macroscale. The aim of the "rst 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 di!erent approaches to de"ne the strain tensor from local variables. The "rst 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 in#uence of the di!erent mechanisms of the local kinematics (kinematics at contact and displacement of neighbouring particles) to be demonstrated.