Modelisation of granular media and solid third bodies using rigid and/or deformable discrete elements : Influence of the local behavior on the global behavior
type: Dataset
description: The Discrete Element Methods are the most appropriate methods to model the divided feature of some media such as granular ones, masonries or contact interfaces... Many studies have provided a better understanding of their behavior, but in some cases the impact of both volume description (rigid or deformable) and interaction laws (elastic or plastic) is not negligible on the global behavior. The approach used here is based on the "Non Smooth Contact Dynamic" framework which mixes naturally the rigid and deformable formulations. One propose to analyze the influence of this description. For this purpose, two different applications are used, related to the quasi-static behavior of granular media and to the modelization of the tribological interface under dynamic solicitations.The study of quasi-static behavior of granular media is developed though biaxial compression test and shear test. Contrary to classical approaches, deformable particles are used. The results are compared using tools such as the stress-strain macroscopic relation, the compacity... They show that it is not possible to converge to deformable particle with a rigid description and underline the importance to performance full analyze with deformable description.The modeling of a tribological interface under dynamic solicitation focuses on the influence of boundary conditions, models of the first bodies and the third body on the rheology of the interface. In each simulation, the macroscopic friction, the velocity profile and stress profile are observed. The different models used have not a large influence on the friction value but a large influence on the velocity profiles. This underline the importance of the choice of the model when investigation are performed on the rheology of the third body.
identifier: NNT: 2011ISAL0045
issued: 2026-05-22T19:29:29.469529
language: fr
modified: 2026-05-22T19:29:29.469535
contact point: Organization
  fn: CCSD
keyword: fem
keyword: frottements
keyword: granular-medium
keyword: infoeu-reposemanticsdoctoralthesis
keyword: mecanique-des-contacts
keyword: mecanique-des-structures
keyword: milieux-granulaires
keyword: non-smooth-contact-dynamics
keyword: rheologie
keyword: spiotherengineering-sciences-physicsother
keyword: theses
keyword: third-body-flow
keyword: tribologie
keyword: tribology
keyword: troisieme-corps
landing page: https://theses.hal.science/tel-00684953

Modelisation of granular media and solid third bodies using rigid and/or deformable discrete elements : Influence of the local behavior on the global behavior
type: Distribution
format: HTML
issued: 2026-05-22T19:29:29.474641
modified: 2026-05-22T19:29:29.435745
access URL: https://theses.hal.science/tel-00684953

test_moissonnage_selune
type: Agent