Modélisation semi-analytique des contacts mécaniques complexes : application aux problèmes inclusionnaires et à l’usure des surfaces revêtues
type: Dataset
contact point: Organization
  fn: CCSD
keyword: mecanique-des-contacts
keyword: usure-mecanique
keyword: stick-slip
keyword: tribology
keyword: freeting
keyword: theses
keyword: tribologie
keyword: plasticite-de-transformation
keyword: spiotherengineering-sciences-physicsother
keyword: complex-mechanical-contacts
keyword: infoeu-reposemanticsdoctoralthesis
keyword: numerical-analysis
keyword: modelisation-numerique
landing page: https://theses.hal.science/tel-00684944
description: Fan blade roots of jet engines are operating under fretting sollicitations. This results in two types of damage: (i) initiation and crack propagation, and (ii) wear of contact surfaces. OBJECTIVE: A semi-analytical method has been developed in order to solve the industrial problem. This method is fast-computing and able to deal with elastic-plastic coated contacts and / or heterogeneous, and has bee developed from existing items and innovative analytical and numerical solutions. METHOD: The structure is simplified by assuming two semi-infinite elastic solid in contact, and analytical solutions for: + Contributions of elementary normal and tangential loads constant over a rectangular area + Contributions of elementary plastic strains constant on a parallelepiped + Contributions basic incompatibility of deformations related to a heterogeneous (inclusions, coatings, damage ,...) constant on a parallelepiped. >> on surface displacements and stresses in the volume. Surface displacements and stresses in the volume are then expressed using discrete convolution products (2D or 3D-FFT) between the coefficients of influence and the surfacic (loading surface) or volumic (plastic deformation or inconsistency) source. The normal and tangential problems in both the gross-slip and stick-slip regime can be solved, taking into account the effect of plasticity and heterogeneities. The contact algorithm used (elastic contact) has been developed by L. Gallego while the base of the plastic solver has been developed by C. Jacq (frictionless elastic-plastic contact) RESULTS: New analytical solutions are given for calculating the residual tangential displacements.
identifier: NNT: 2011ISAL0061
issued: 2026-05-22T19:29:52.986041
language: en
modified: 2026-05-22T19:29:52.986046

test_moissonnage_selune
type: Agent

Modélisation semi-analytique des contacts mécaniques complexes : application aux problèmes inclusionnaires et à l’usure des surfaces revêtues
type: Distribution
access URL: https://theses.hal.science/tel-00684944
format: HTML
issued: 2026-05-22T19:29:53.023504
modified: 2026-05-22T19:29:52.953188